/sci/ - Science & Math » Thread #10002000

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/mg/ math general

Anonymous Fri 14 Sep 13:15:01 2018 No.10002000 View Reply Original Report

Quoted By: >>10002016 >>10002430 >>10003825 >>10004386 >>10004485 >>10008738

A toast to our fallen comrades edition. Talk math.

Anonymous

Anonymous Fri 14 Sep 2018 13:22:44 No.10002016 Report

Quoted By: >>10002064

>>10002000
Witnessed!

>>10002004
This all seems so boring. You're a physishit in all but name.

Anonymous

Anonymous Fri 14 Sep 2018 13:27:27 No.10002027 Report

Quoted By: >>10002075 >>10007201

Based Slobodan.

2nd for: French universities are the best in the world.

Anonymous

Anonymous Fri 14 Sep 2018 13:46:59 No.10002059 Report

Quoted By: >>10002101 >>10002118

Maybe I'll finally read that paper on forcing today

Anonymous

Anonymous Fri 14 Sep 2018 13:52:21 No.10002064 Report

Quoted By: >>10002305

>>10002016
Fair, but remember that optimisation isn't just used to solve physical problems, but abstract mathematical problems as well.

To me it's similar to working on AI (in some cases problems are proven to be equivalent), but better because you find algorithms that are actually tractable and not just spamming the same back propogating weight equation on everything.

Anonymous

Anonymous Fri 14 Sep 2018 13:56:27 No.10002075 Report

Quoted By:

>>10002027
fifth'd

Anonymous

Anonymous Fri 14 Sep 2018 14:11:54 No.10002101 Report

Quoted By:

>>10002059
Don't force yourself.

Anonymous

Anonymous Fri 14 Sep 2018 14:17:33 No.10002118 Report

Quoted By: >>10002134

>>10002059
What paper is it?

Anonymous

Anonymous Fri 14 Sep 2018 14:26:32 No.10002134 Report

Quoted By: >>10002175

>>10002118
>https://arxiv.org/abs/0712.2279
I'm a set theorylet

Anonymous

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Anonymous Fri 14 Sep 2018 14:26:59 No.10002135 Report

Quoted By: >>10002145

>csq tu n'est pas francais

Anonymous

Anonymous Fri 14 Sep 2018 14:29:26 No.10002143 Report

Quoted By:

>>10002042
Non.

Anonymous

Anonymous Fri 14 Sep 2018 14:29:39 No.10002145 Report

Quoted By:

>>10002135
Witty was really smart though

Anonymous

Anonymous Fri 14 Sep 2018 14:42:04 No.10002175 Report

Quoted By:

>>10002134
Set theory fag, for me the hardest part to understanding forcing was the machinery one has to put in place for it to work. Don't get me wrong, some forcing arguments are fucking hard, but not CH, cardinal collapse, and other babies first forcing are actually not that bad. Try not to get to bogged down in the details in the beginning.

Anonymous

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Anonymous Fri 14 Sep 2018 15:05:02 No.10002217 Report

Quoted By: >>10002231 >>10002321

>tfw third and final year of math bachelor
>tfw less that 30 left out of more than a hundred that started

Anonymous

Anonymous Fri 14 Sep 2018 15:09:49 No.10002231 Report

Quoted By:

>>10002217
We tend to forget that the dropout rate for university is colossal. Everyone will constantly tell you that your bachelors degree is nothing to be proud about. But fuck them it's still an achievement in its own right.

Anonymous

Anonymous Fri 14 Sep 2018 16:10:21 No.10002305 Report

Quoted By:

>>10002064
I like you anon, I wish you the best.

Anonymous

Anonymous Fri 14 Sep 2018 16:21:21 No.10002321 Report

Quoted By: >>10002435

>>10002217
Name in pic?

Anonymous

Anonymous Fri 14 Sep 2018 16:45:08 No.10002363 Report

Quoted By: >>10002375 >>10002487 >>10002689 >>10004094 >>10004539

Tiens, vu que y'a des Français :
Je suis en école d'ingé privé (je me suis fait mémer assez hard), mais je me suis découvert une passion pour les maths. Je fais du ML en tant que projet, et je pensais bosser un peu dans le privé avant de faire une thèse de ML bien matheuse, peut être a l'étranger (j'ai peut être un plan pour Oxford).
Ca se fait ?

Anonymous

Anonymous Fri 14 Sep 2018 16:53:57 No.10002375 Report

Quoted By: >>10002689

>>10002363
C'est une idée stupide.

Anonymous

Anonymous Fri 14 Sep 2018 17:26:55 No.10002426 Report

Quoted By:

I hate this general.

Anonymous

Anonymous Fri 14 Sep 2018 17:28:53 No.10002430 Report

Quoted By: >>10002693

>>10002000
Who's that in the pic?

Anonymous

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Anonymous Fri 14 Sep 2018 17:34:08 No.10002435 Report

Quoted By:

>>10002321
Belle Delphine

Anonymous

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Anonymous Fri 14 Sep 2018 17:37:22 No.10002438 Report

Quoted By:

>>10000000

Anonymous

Anonymous Fri 14 Sep 2018 18:03:08 No.10002487 Report

Quoted By:

>>10002363
Bof, je m'y connais pas trop en école d'ingé, ni en ML mais pourquoi pas.
Par contre ça risque d'être tendax de choper une thèse vu le nombre de personnes qui se lancent là dedans avec un background un peu plus adapté en ce moment (tout le monde ne fait pas une thèse là dedans, tu me diras, mais quand même).

Anonymous

Anonymous Fri 14 Sep 2018 20:06:29 No.10002689 Report

Quoted By:

>>10002363
Go for it. This guy >>10002375 is an idiot.
Machine Learning is very lucrative.

Anonymous

Anonymous Fri 14 Sep 2018 20:08:48 No.10002693 Report

Quoted By: >>10002707 >>10002739 >>10003312 >>10007537

>>10002430
slobodan praljak, a croatian war criminal

Anonymous

Anonymous Fri 14 Sep 2018 20:15:27 No.10002707 Report

Quoted By: >>10002795 >>10003312

>>10002693
To add, he's "notable" because he an hero'd by poisoning himself dramatically in the court room after being convicted of crimes against humanity

Anonymous

Anonymous Fri 14 Sep 2018 20:16:44 No.10002710 Report

Quoted By:

>>10000286
Are you the SNS student or someone else who's trying to catfish me with cute anime ?

Anonymous

Anonymous Fri 14 Sep 2018 20:31:24 No.10002739 Report

Quoted By: >>10003312 >>10007463

>>10002693
>Slobodan Praljak
>war criminal

No.

The Lord

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The Lord Fri 14 Sep 2018 21:01:57 No.10002795 Report

Quoted By: >>10003161 >>10003312

>>10002707
Was his grand daughter the sperm agent behind the consecration of the abomination known as Barron Trump?

Anonymous

Anonymous Fri 14 Sep 2018 23:52:55 No.10003161 Report

Quoted By: >>10003312

>>10002795
>The Lord
Cringe

Anonymous

Anonymous Sat 15 Sep 2018 01:10:03 No.10003312 Report

Quoted By:

>>10002693
>>10002707
>>10002739
>>10002795
>>10003161
>>>/pol/

Anonymous

Anonymous Sat 15 Sep 2018 02:04:20 No.10003391 Report

Quoted By: >>10003428 >>10003529

lads
could one successfully major in math if one had both calc aps and a 1540 sat but was a year behind

after reading about people like von neumann or even the fields winner meme i feel intellectually lacking for the field desu

cs meme sounds boring, though

Anonymous

Anonymous Sat 15 Sep 2018 02:36:58 No.10003428 Report

Quoted By:

>>10003391
Only brainlets think you have to be a genius to get an undergraduate degree.

Anonymous

Anonymous Sat 15 Sep 2018 03:55:57 No.10003529 Report

Quoted By: >>10003664

>>10003391
>after reading about people like von neumann or even the fields winner meme i feel intellectually lacking for the field desu
The first thing I see when entering this shit general. Leaving immediately.

Anonymous

Anonymous Sat 15 Sep 2018 05:37:03 No.10003664 Report

Quoted By:

>>10003529
It's the weekend, of course there are going to be visitors and more off-topic posts. chill out anon

Anonymous

Anonymous Sat 15 Sep 2018 06:22:07 No.10003718 Report

Quoted By: >>10003726 >>10003739 >>10004584

>spend an hour writing proof
>goes to do some chores
>come back and read my earlier writings
>absolutely no idea what the fuck I was talking about

wat do

Anonymous

Anonymous Sat 15 Sep 2018 06:26:57 No.10003726 Report

Quoted By:

>>10003718
Post it here so we can alternate between helping you and mocking your incomprehensible proof

Anonymous

Anonymous Sat 15 Sep 2018 06:34:28 No.10003739 Report

Quoted By:

>>10003718
try smearing shit on a wall and take a picture of it
math general would be great again

Anonymous

Anonymous Sat 15 Sep 2018 07:28:59 No.10003825 Report

Quoted By:

>>10002000
Why is the new Editorial Manager such a piece of shit /mg/?

Fucking can't compile tex for shit.

Anonymous

Anonymous Sat 15 Sep 2018 08:27:42 No.10003930 Report

Quoted By: >>10003936 >>10003954 >>10003993 >>10004038 >>10004473 >>10004584

>do a lot of difficult (for my year level) math during high school due to taking the hardest classes
>get burned out and drop STEM altogether for two years
>now getting motivated to get into math again and maybe work towards getting into grad school for probability or stats
>problem is I haven't practiced for years and forgot some of the basics
If I go to college for a BS in math, am I in for a rough assfucking? Eurofag by the way.

Anonymous

Anonymous Sat 15 Sep 2018 08:30:51 No.10003936 Report

Quoted By: >>10003948

>>10003930
It's easy to get up to speed on something you learned before. You won't really have problems, unless the university you're aiming for is super competitive.

Anonymous

Anonymous Sat 15 Sep 2018 08:38:31 No.10003948 Report

Quoted By: >>10003993

>>10003936
Ok, great. How do I make sure to stay on top of things? It sounds dumb but I never learned how to work hard at school (always got by just by rereading things), so I'm not certain how to deal with university.

Anonymous

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Anonymous Sat 15 Sep 2018 08:43:18 No.10003954 Report

Quoted By: >>10003958 >>10004011

>>10003930
Regain back your high school math knowledge, even if it’s mean finishing an elementary book one by one. I recommend George Chrystal Elementary Algebra and Kiselev Geometry. Or start with Apostol on the go. Promise me you work hard, ok?

Recommended books:
http://4chan-science.wikia.com/wiki/Mathematics

You can download math books for free at:
http://libgen.io/

Anonymous

Anonymous Sat 15 Sep 2018 08:46:07 No.10003958 Report

Quoted By:

>>10003954
Yeah I bought a book yesterday to refresh my memory. Thanks anon.

Anonymous

Anonymous Sat 15 Sep 2018 09:17:56 No.10003993 Report

Quoted By: >>10004165 >>10004584

>>10003930
You can do it. Don't worry too much about it

>>10003948
>always read (or at least skim) the material before the lectures
>always check the proofs a second time later so that you make sure you understand everything
>if you don't understand something, just go to the professor. don't ask /sci/
>do all the problems assigned in class ASAP
>don't stay up late browsing 4chan or playing video games, even better if you have a set routine of studying from 9 to 17 every day
That's all, there are no secrets to it. Some of it may seem redundant in the beginning, but once you're taking several challenging classes it'll pay off to have good habits. First year at Euro unis are easy, use that to build good habits.

Anonymous

Anonymous Sat 15 Sep 2018 09:34:38 No.10004011 Report

Quoted By:

>>10003954
Based anime wikia link poster.

Anonymous

Anonymous Sat 15 Sep 2018 10:04:40 No.10004038 Report

Quoted By: >>10004165

>>10003930
Why do you even want a BS degree to be honest? You can just start a masters in prob/stats and take some supplementary coursework.

Anonymous

Anonymous Sat 15 Sep 2018 11:16:50 No.10004094 Report

Quoted By: >>10004103 >>10004312

>>10002363
t'as aucune chance avec ton ecole de ski privee gros
t'es loin d'etre le seul qui se decouvre une passion pour le ml

Anonymous

Anonymous Sat 15 Sep 2018 11:22:04 No.10004103 Report

Quoted By:

>>10004094
ne sois pas méchant

Anonymous

Anonymous Sat 15 Sep 2018 11:29:16 No.10004111 Report

Quoted By: >>10004116 >>10004117

Friendly reminder to report non-English posts

Anonymous

Anonymous Sat 15 Sep 2018 11:33:23 No.10004116 Report

Quoted By:

>>10004111
dumb englishposter

Anonymous

Anonymous Sat 15 Sep 2018 11:34:06 No.10004117 Report

Quoted By:

>>10004111
>languagelet
mdr

Anonymous

Anonymous Sat 15 Sep 2018 11:47:54 No.10004140 Report

Quoted By: >>10004144

>>>/r9k/48136927

Anonymous

Anonymous Sat 15 Sep 2018 11:49:54 No.10004144 Report

Quoted By: >>10004173

>>10004140
THAT FUCKING SON OF A BITCH TRAITOR

Anonymous

Anonymous Sat 15 Sep 2018 12:05:26 No.10004165 Report

Quoted By: >>10004171

>>10003993
Thanks for the advice.
>>10004038
You can't do that in Europe. I didn't even know you could do a master's without a relevant BS in the US.

Anonymous

Anonymous Sat 15 Sep 2018 12:08:14 No.10004171 Report

Quoted By: >>10004177

>>10004165
>You can't do that in Europe
Wait, do you mean you didn't finish your undergrad? Otherwise you can.

I'm in the EU.

Anonymous

Anonymous Sat 15 Sep 2018 12:08:34 No.10004173 Report

Quoted By:

>>10004144
>TRAITOR
I am true to my word m8.

Anonymous

Anonymous Sat 15 Sep 2018 12:11:22 No.10004177 Report

Quoted By: >>10004504

>>10004171
No, I was referring to a BS as in, the degree that comes before the MSc. I'm going to start this year.

Anonymous

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Anonymous Sat 15 Sep 2018 12:27:12 No.10004195 Report

Quoted By:

Why are weierstrass products so comfy, bros?
>tfw you can create analytic functions with specified zeros

Anonymous

Anonymous Sat 15 Sep 2018 14:01:11 No.10004312 Report

Quoted By:

>>10004094
Et une thèse en probas?

Anonymous

Anonymous Sat 15 Sep 2018 14:08:55 No.10004325 Report

Quoted By: >>10004330 >>10012189

Bros, I need help.

Im an EE freshman and to supplement my calc classes (that I don't like that much bc my professor is a meem, nevermind that though) I'm also taking MIT's ocw 18.01.

The thing is that I need to learn proofs and never in my fucking life learnt that, is there a primer on proofs that you would suggest?

Anonymous

Anonymous Sat 15 Sep 2018 14:10:41 No.10004330 Report

Quoted By: >>10004337

>>10004325
If you have the patience for it, study How To Prove It: A structured approach
I used it many years ago and it served me well

Anonymous

Anonymous Sat 15 Sep 2018 14:18:43 No.10004337 Report

Quoted By:

>>10004330
I'll look it up, thanks.

Anonymous

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Anonymous Sat 15 Sep 2018 14:52:25 No.10004386 Report

Quoted By: >>10004404 >>10005847

>>10002000
Help dudes, this function broke my calculus. a = -1/2 seems to me to be a relative minimum yet Wolfram Alpha says that the derivative at this point exists, and is finite and non-zero. But this contradicts the theorem which states that every relative extremum is a critical point. I think that Wolfram is wrong and that the derivative is not defined at this point, as the two functions inside the maximum are equal in value at this point, but the derivatives have different signs. Pls help a chemist pleb.

Anonymous

Anonymous Sat 15 Sep 2018 15:02:30 No.10004404 Report

Quoted By:

>>10004386
You're right. It's not differentiable at -1/2

Anonymous

Anonymous Sat 15 Sep 2018 15:13:09 No.10004426 Report

Quoted By: >>10004428 >>10006668

Im intending to apply to an econ phd. but first i am getting a math bachelor's. If I can only take 2 out of these 3, which should I take? Real analysis, algebra, topology

Anonymous

Anonymous Sat 15 Sep 2018 15:14:42 No.10004428 Report

Quoted By:

>>10004426
This is the time when you just let your dick choose for you

Anonymous

Anonymous Sat 15 Sep 2018 15:27:06 No.10004447 Report

Quoted By: >>10004448

Trying to understand tensors.

Suppose I have a vector v <1,2,3> in E3 (ie basis <1,1,1>) and it therefore travels from the origin to point 1,2,3. Now say I change basis to <2,1,1>, but I want to travel between the same points. Is this the "tensor" that does that, ie. is invariant under a change of coordinates?

$ \begin{matrix} 1 0 0 \\ 0 2 0 \\ 0 0 3 \\ \end{bmatrix}$

Anonymous

Anonymous Sat 15 Sep 2018 15:27:47 No.10004448 Report

Quoted By: >>10004452 >>10004493

>>10004447
Trying to understand tensors.

Suppose I have a vector v <1,2,3> in E3 (ie basis <1,1,1>) and it therefore travels from the origin to point 1,2,3. Now say I change basis to <2,1,1>, but I want to travel between the same points. Is this the "tensor" that does that, ie. is invariant under a change of coordinates?
$ \begin{bmatrix} 1 0 0 \\ 0 2 0 \\ 0 0 3 \\ \end{bmatrix}$

Anonymous

Anonymous Sat 15 Sep 2018 15:30:13 No.10004452 Report

Quoted By: >>10004459

>>10004448
not the same guy but your question is very confuse me!

Anonymous

Anonymous Sat 15 Sep 2018 15:36:56 No.10004459 Report

Quoted By: >>10004484

>>10004452
If I dot product that tensor by any 3D basis, I should get the same thing right?

Anonymous

Anonymous Sat 15 Sep 2018 15:44:02 No.10004473 Report

Quoted By: >>10004503

>>10003930
focusing on prob and stats is enlightened

Anonymous

Anonymous Sat 15 Sep 2018 15:50:10 No.10004484 Report

Quoted By: >>10004502

>>10004459
i'm sorry, i really can't make out your question
i might not be the one to answer
but i don't know what you mean by dotting a 3D basis; i talk of dotting two vectors/tensors together

Anonymous

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Anonymous Sat 15 Sep 2018 15:50:19 No.10004485 Report

Quoted By:

>>10002000
I'm starting Calculus I right now and I completely forgot Algebra 2 and Precalculus. I vaguely remember the material and I'm trying to catch up with Khan academy.Should I end it?

Anonymous

Anonymous Sat 15 Sep 2018 15:57:23 No.10004493 Report

Quoted By: >>10004530

>>10004448
Tensors are just multilinear functionals.

Anonymous

Anonymous Sat 15 Sep 2018 16:03:52 No.10004502 Report

Quoted By: >>10004514

>>10004484
If I change basis from i=1, j=1, k=1 to i=2,j=1,k=1 this
$ \begin{bmatrix} 1 0 0 \\ 0 2 0 \\ 0 0 3 \\ \end{bmatrix}$
dotted by <2,1,1> is going to give me a vector that points to the same place?

Anonymous

Anonymous Sat 15 Sep 2018 16:04:02 No.10004503 Report

Quoted By: >>10004638

>>10004473
More like the only way to get a non-research job.

Anonymous

Anonymous Sat 15 Sep 2018 16:05:22 No.10004504 Report

Quoted By:

>>10004177
If you have a BA you should be able to get into a MSc.

Anonymous

Anonymous Sat 15 Sep 2018 16:10:52 No.10004514 Report

Quoted By: >>10007992

>>10004502
i must sleep
i still may not know what i'm talking about
but for me, a basis is a set of normalized (norm of 1) vectors
so a basis might be the set of <1, 0, 0>, <0, 1, 0>, <0, 0, 1>, or it might be <cos(t), sin(t), 0>, <-sin(t), cos(t), 0>, <0, 0, 1> for some t
and then one vector, say <1, 0, 0>, i would say is i=1, j=0, k=0
but i can't understand changing basis from i=1, j=1, k=1 to i=2,j=1,k=1 :(

Anonymous

Anonymous Sat 15 Sep 2018 16:20:45 No.10004530 Report

Quoted By: >>10004640

>>10004493
>functionals
>implying tensors map into R ever
Fucking retard

Anonymous

Anonymous Sat 15 Sep 2018 16:26:46 No.10004539 Report

Quoted By:

>>10002363
vu ou t'en es oublie la these aux us mdr mais tente les boites de conseil, genre stage de 6 mois et paf ils t'embauchent

Anonymous

Anonymous Sat 15 Sep 2018 16:45:38 No.10004584 Report

Quoted By:

>>10003718
Try writing annotations and flushing out your argument more next time you write a proof. My topology prof made us do that for every proof to really hammer in how and why each proof worked so we wouldn't forget the inner workings. It's tedious, but useful. The fact that you forgot the proof so quickly is kind of an indication that there's some gap in understanding.
>>10003930
You'll be fine anon, a math BS isn't as hard as people make it out to be provided you work hard. Make sure to space yourself, you're running a marathon. Each class will build on each other so it's important that you really try and understand the material at each stage. Doing problems will help you get better and math and understand the material. Also there's no shame in going to math stax or whatever to ask about difficulties you're having. Literally everyone who tries out math finds something difficult at some point (unless they quit early), even Tao, Grothendieck, and Scholze all have areas of math that they consider themselves to be weak at. Keep a good pace and also follow >>10003993 advice, it's good. Honestly, 4chan really is a black hole of time and my productivity has gone down ever since I started using the site. Escape while you can.

Anonymous

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Anonymous Sat 15 Sep 2018 17:05:08 No.10004638 Report

Quoted By: >>10004668

>>10004503
It's the only interesting application of math desu

Anonymous

Anonymous Sat 15 Sep 2018 17:06:22 No.10004640 Report

Quoted By: >>10004651

>>10004530
You're the retard: https://en.wikipedia.org/wiki/Tensor#As_multilinear_maps

Anonymous

Anonymous Sat 15 Sep 2018 17:10:12 No.10004651 Report

Quoted By: >>10004750

>>10004640
>doesn't understand that the link a special form of the multilinear map under the isomorphism $L(V,W) \cong V^*\otimes W$ for which $V,W$ are real and finite dimensional
>calls anyone a retard
Leave your Dunning-Kruger at the door, kid

Anonymous

Anonymous Sat 15 Sep 2018 17:18:14 No.10004668 Report

Quoted By: >>10007467

>>10004638
What is that pic supposed to imply? Stats & prob mostly lead to ML and "data" jobs in industry.

Anonymous

Anonymous Sat 15 Sep 2018 17:34:42 No.10004721 Report

Quoted By: >>10004744

>tfw applied math is almost monopolized by statistics
What are my options if I want to work on real-world problems but stats aren't my thing? inb4 just do physics

Anonymous

Anonymous Sat 15 Sep 2018 17:42:44 No.10004744 Report

Quoted By:

>>10004721
Maybe cryptography

Anonymous

Anonymous Sat 15 Sep 2018 17:44:56 No.10004750 Report

Quoted By: >>10004753

>>10004651
The different definitions give the same object when the linear space is finite dimensional.

Anonymous

Anonymous Sat 15 Sep 2018 17:47:00 No.10004753 Report

Quoted By: >>10004778 >>10004803 >>10008206

>>10004750
When the linear space is infinite dimensional there is no way to define 'tensors' and 'tensor products' uniquely, so it makes no sense to talk about unqualified 'tensors' in that case.

Anonymous

Anonymous Sat 15 Sep 2018 17:56:44 No.10004778 Report

Quoted By:

>>10004753
What do you mean? The tensor product can still be constructed as a quotient of the free vector space of V × W

Anonymous

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Anonymous Sat 15 Sep 2018 18:12:06 No.10004803 Report

Quoted By: >>10004828

>>10004753
>When the linear space is infinite dimensional there is no way to define 'tensors' and 'tensor products' uniquely

Anonymous

View Same Google iqdb SauceNAO Onee san went to Harvard, what a (...).png, 573KiB, 1200x1150

Anonymous Sat 15 Sep 2018 18:13:59 No.10004810 Report

Quoted By: >>10006496

Anonymous

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Anonymous Sat 15 Sep 2018 18:19:57 No.10004822 Report

Quoted By: >>10004836

Dad went to MIT, your sister went to Harvard, what about you Anon?

Anonymous

Anonymous Sat 15 Sep 2018 18:22:09 No.10004828 Report

Quoted By:

>>10004803
Ironic.

Anonymous

Anonymous Sat 15 Sep 2018 18:26:27 No.10004836 Report

Quoted By: >>10004840

>>10004822
I don't know your sources, but they seem to be wrong.

Anonymous

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Anonymous Sat 15 Sep 2018 18:26:28 No.10004838 Report

Quoted By: >>10004842

Anon, your half-sister just got accepted into SNS. She even picked up drawing as a hobby! What about you Anon?

Anonymous

Anonymous Sat 15 Sep 2018 18:28:58 No.10004840 Report

Quoted By:

>>10004836
Oh crap desu, you're right. I'll fix it up in the next thread or something.

Anonymous

Anonymous Sat 15 Sep 2018 18:29:12 No.10004842 Report

Quoted By: >>10004844

>>10004838
I don't know who you are but I'm not related to any drawings

Anonymous

Anonymous Sat 15 Sep 2018 18:29:59 No.10004844 Report

Quoted By:

>>10004842
but are you cute?

Anonymous

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Anonymous Sat 15 Sep 2018 18:36:07 No.10004858 Report

Quoted By: >>10004896 >>10005572

No need to explain

Anonymous

Anonymous Sat 15 Sep 2018 18:46:35 No.10004896 Report

Quoted By:

>>10004858
I was about to ask whether the that uni is bad but then I realised its acronym is CUNY.

Anonymous

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Anonymous Sat 15 Sep 2018 18:48:14 No.10004899 Report

Quoted By: >>10005572

Remember to REPRESENT

Anonymous

Anonymous Sat 15 Sep 2018 18:51:20 No.10004905 Report

Quoted By: >>10004912 >>10004921 >>10004937 >>10004962 >>10005300 >>10005374 >>10005416 >>10007803 >>10008099 >>10008135 >>10008665 >>10008992 >>10009875

What other Uni are you Anons in?
Asking for a friend

Anonymous

Anonymous Sat 15 Sep 2018 18:52:26 No.10004912 Report

Quoted By: >>10004942 >>10008665

>>10004905
>What other Uni are you Anons in?
U of T

Anonymous

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Anonymous Sat 15 Sep 2018 18:56:19 No.10004921 Report

Quoted By: >>10004931

>>10004905

Anonymous

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Anonymous Sat 15 Sep 2018 19:02:16 No.10004931 Report

Quoted By: >>10005572

>>10004921
lmao

Anonymous

View Same Google iqdb SauceNAO École Polytechnique F&eac (...).png, 402KiB, 1250x1100

Anonymous Sat 15 Sep 2018 19:03:37 No.10004935 Report

Quoted By: >>10005039

Not gonna do the discount Lyon

Anonymous

Anonymous Sat 15 Sep 2018 19:04:42 No.10004937 Report

Quoted By: >>10005537 >>10005572

>>10004905
lmao, my uni is ranked 351-400 by QS. I won't humiliate myself further by naming it.

Anonymous

View Same Google iqdb SauceNAO UT AUSTIN.png, 4MiB, 1250x1100

Anonymous Sat 15 Sep 2018 19:07:09 No.10004942 Report

Quoted By: >>10004977 >>10005572

>>10004912
Srry, took a while desu

Anonymous

Anonymous Sat 15 Sep 2018 19:13:58 No.10004962 Report

Quoted By:

>>10004905
None.

Anonymous

Anonymous Sat 15 Sep 2018 19:19:05 No.10004977 Report

Quoted By: >>10004987

>>10004942
>Srry, took a while desu
I meant U of Toronto :(

Anonymous

View Same Google iqdb SauceNAO Non Binary.png, 479KiB, 1300x1150

Anonymous Sat 15 Sep 2018 19:22:18 No.10004987 Report

Quoted By: >>10004989 >>10004992 >>10004997 >>10005084 >>10005572

>>10004977

Anonymous

Anonymous Sat 15 Sep 2018 19:23:02 No.10004989 Report

Quoted By:

>>10004987
based

Anonymous

Anonymous Sat 15 Sep 2018 19:23:36 No.10004992 Report

Quoted By:

>>10004987
nice, looking like a rotman thot

Anonymous

Anonymous Sat 15 Sep 2018 19:25:20 No.10004997 Report

Quoted By: >>10005001

>>10004987
You could do something important with your time, too. Just saying.

Anonymous

Anonymous Sat 15 Sep 2018 19:26:09 No.10005001 Report

Quoted By: >>10005004

>>10004997
>You could do something important with your time, too.
but she is

Anonymous

Anonymous Sat 15 Sep 2018 19:26:55 No.10005004 Report

Quoted By: >>10005019

>>10005001
How is he doing anything important?

Anonymous

View Same Google iqdb SauceNAO ETH.png, 819KiB, 906x1000

Anonymous Sat 15 Sep 2018 19:30:52 No.10005019 Report

Quoted By: >>10005022 >>10005199 >>10005220

>>10005004
I actually just finished reviewing for my calc 2 & chem exam that's supposed to come in 2 weeks so I'm just taking a break doing this desu

Anonymous

Anonymous Sat 15 Sep 2018 19:32:17 No.10005022 Report

Quoted By: >>10005030

>>10005019
Oh wow! That's an incredible feat!

Anonymous

Anonymous Sat 15 Sep 2018 19:33:35 No.10005030 Report

Quoted By:

>>10005022
kek

Anonymous

Anonymous Sat 15 Sep 2018 19:35:39 No.10005039 Report

Quoted By: >>10005043 >>10005298

>>10004935
Why are the grandes ecole so popular on /mg/ now

Anonymous

Anonymous Sat 15 Sep 2018 19:36:49 No.10005043 Report

Quoted By: >>10005054 >>10005065

>>10005039
Because France is the only nation that is good at math

Anonymous

Anonymous Sat 15 Sep 2018 19:40:44 No.10005054 Report

Quoted By: >>10005062

>>10005043
But do you get 300k/starting

Anonymous

Anonymous Sat 15 Sep 2018 19:44:55 No.10005062 Report

Quoted By: >>10005070

>>10005054
Americucks only care about hard cold cash and not the prestige

Anonymous

Anonymous Sat 15 Sep 2018 19:46:14 No.10005065 Report

Quoted By: >>10005098

>>10005043
What do you base that on?
Is that observable even at the licence/bachelor's level?
t. frog

Anonymous

Anonymous Sat 15 Sep 2018 19:48:18 No.10005070 Report

Quoted By:

>>10005062
They are barbarians. Instead of embarking on an intellectual journey, they desire money. To reach this money, they behave like the moslems shouting "Allahu akbar" by praying for Jesus to help them.

Anonymous

Anonymous Sat 15 Sep 2018 19:48:57 No.10005072 Report

Quoted By:

I never knew cute anime girls and university logos actually work together. Cute girls really make anything work huh.

Anonymous

Anonymous Sat 15 Sep 2018 19:54:55 No.10005084 Report

Quoted By: >>10005086

>>10004987
Source of original art please.

Anonymous

Anonymous Sat 15 Sep 2018 19:55:51 No.10005086 Report

Quoted By: >>10005087

>>10005084
Heading off to work rn, if this thread is still alive I’ll drop the sauce or someone else can

Anonymous

Anonymous Sat 15 Sep 2018 19:56:14 No.10005087 Report

Quoted By: >>10005090

>>10005086
I only need the name of the artist.

Anonymous

Anonymous Sat 15 Sep 2018 19:57:45 No.10005090 Report

Quoted By:

>>10005087
Sorry anon I don’t really look at the names of illustrators.

Anonymous

View Same Google iqdb SauceNAO fields_percapita_572x432.png, 7KiB, 572x432

Anonymous Sat 15 Sep 2018 20:01:52 No.10005098 Report

Quoted By:

>>10005065
I base it of this
T. Unwashed barbarian of the north

Anonymous

Anonymous Sat 15 Sep 2018 20:56:01 No.10005199 Report

Quoted By: >>10005506

>>10005019
>ETH Zurich isn't aligned to the paper.

Anooooon

Anonymous

Anonymous Sat 15 Sep 2018 21:07:02 No.10005220 Report

Quoted By:

>>10005019
>I actually just finished reviewing for my calc 2 & chem exam
Stay out of the /mathematics/ general, please.

Anonymous

Anonymous Sat 15 Sep 2018 21:50:23 No.10005298 Report

Quoted By:

>>10005039
It was about time

Anonymous

View Same Google iqdb SauceNAO x.jpg, 8KiB, 192x262

Anonymous Sat 15 Sep 2018 21:52:01 No.10005300 Report

Quoted By: >>10005305 >>10005514

>>10004905

Anonymous

Anonymous Sat 15 Sep 2018 21:55:00 No.10005305 Report

Quoted By: >>10005323 >>10005523

>>10005300
Stop larping
The idea that so many anons in this particular general would come from the most elite french schools being unlikely is an understatement

Anonymous

View Same Google iqdb SauceNAO IMG_3974.jpg, 2MiB, 3264x2448

Anonymous Sat 15 Sep 2018 22:05:52 No.10005323 Report

Quoted By: >>10005341 >>10005531

>>10005305

Anonymous

Anonymous Sat 15 Sep 2018 22:14:32 No.10005341 Report

Quoted By:

>>10005323
God I want to kill myself

Anonymous

Anonymous Sat 15 Sep 2018 22:26:01 No.10005374 Report

Quoted By:

>>10004905
best argie eng uni
tfw brainlet though.

Anonymous

View Same Google iqdb SauceNAO 1473215797411.jpg, 75KiB, 470x480

Anonymous Sat 15 Sep 2018 22:29:00 No.10005382 Report

Quoted By: >>10005389 >>10005557 >>10006590 >>10006655 >>10007564 >>10008081

How do you guys find time to do other shit? Like I used to do math as a hobby, but also enjoyed reading, especially the classics. Now however once I've started studying it in a relatively good uni, my time is gone. It's not too bad, about 40 hrs a week is the expected study time, but this leaves basically just the weekend. I'm afraid I'll burn out if I force myself to study other stuff "for fun" in my free time.

Anonymous

Anonymous Sat 15 Sep 2018 22:33:39 No.10005389 Report

Quoted By:

>>10005382
I've wondered about that as well, but I think probably we should just quit 4chan forever

Anonymous

View Same Google iqdb SauceNAO rutgers.jpg, 47KiB, 720x558

Anonymous Sat 15 Sep 2018 22:48:17 No.10005416 Report

Quoted By:

>>10004905
based rutgers
>went to this school because i did badly in hs and its not too competitive
>major in math and find out its actually got a really good math department

Anonymous

Anonymous Sat 15 Sep 2018 23:38:44 No.10005506 Report

Quoted By:

>>10005199
I was hoping no one realized it cuz I spent a little bit too much time doing others and not enough time on eth (rush to get dressed for work)

Anonymous

Anonymous Sat 15 Sep 2018 23:40:54 No.10005510 Report

Quoted By: >>10008216

Quick rundown on the difference between multivariable calculus, vector calculus and calculus on manifolds? I vaguely guess manifolds are more general than vectors but I'm really lost on this.

Anonymous

Anonymous Sat 15 Sep 2018 23:42:45 No.10005514 Report

Quoted By:

>>10005300
Bitch I did that one already.
(Nice ass uni tho, respect)

Anonymous

Anonymous Sat 15 Sep 2018 23:46:38 No.10005523 Report

Quoted By:

>>10005305
You would be surprised. A lot of anons here actually came from top tier unis

Anonymous

Anonymous Sat 15 Sep 2018 23:53:51 No.10005531 Report

Quoted By: >>10005540 >>10005544 >>10006185

>>10005323
Fuck. So there really are normaliens here too? Now I really wish that fag posted his email address in previous thread.

Anonymous

Anonymous Sat 15 Sep 2018 23:55:34 No.10005537 Report

Quoted By:

>>10004937
Unless you're in detroit or bagdad, then no one will remember it.

Anonymous

Anonymous Sat 15 Sep 2018 23:58:36 No.10005539 Report

Quoted By:

There used to be a time when only losers were posting on 4chan you know. What are all these successful people doing here?

Anonymous

Anonymous Sat 15 Sep 2018 23:58:52 No.10005540 Report

Quoted By: >>10005549 >>10005562

>>10005531
There’s 1-2 from ENS and 1 from SNS

Anonymous

Anonymous Sun 16 Sep 2018 00:00:56 No.10005544 Report

Quoted By:

>>10005531
I wanna bang the SNS one

Anonymous

View Same Google iqdb SauceNAO Gun-to-your-head.jpg, 25KiB, 838x475

Anonymous Sun 16 Sep 2018 00:02:44 No.10005549 Report

Quoted By:

>>10005540
>the probability that a future Fields medalist is posting here is not entirely negligible
>mfw

Anonymous

Anonymous Sun 16 Sep 2018 00:06:46 No.10005557 Report

Quoted By:

>>10005382
From this day forward I will do nothing but math 24/7. I will do math in my sleep! You think all these fuckers who go to fancy schools have me beat? No way, I do not give up and I never back down. Fuck all of you.

Anonymous

Anonymous Sun 16 Sep 2018 00:09:05 No.10005562 Report

Quoted By: >>10005564

>>10005540
What are they working on?

Anonymous

Anonymous Sun 16 Sep 2018 00:10:20 No.10005564 Report

Quoted By:

>>10005562
Urethra insertion.

Anonymous

Anonymous Sun 16 Sep 2018 00:12:50 No.10005572 Report

Quoted By: >>10007319

>>10004937
You too fuckhead. Don't let these snobs with sticks up their asses bring you down.

>>10004942
You too. Hit the books.

>>10004931
You too. We Gattaca now!

>>10004899
You too. By pure force of will alone, we will shit all over these babies who were born with a coin in their mouths!

>>10004858
You too. It's time to cut all the Harvard/MIT/SNS/EPFL/EP/ENS faggots down a notch.

>>10004987
Not you though. Leafs get the rake.

Anonymous

Anonymous Sun 16 Sep 2018 00:21:00 No.10005597 Report

Quoted By: >>10006338

Is this what an existential crisis feels like?
What have I been doing with my life?

Anonymous

Anonymous Sun 16 Sep 2018 00:27:46 No.10005613 Report

Quoted By: >>10007323

I am never posting on 4chan again. Everything went downhill with Trump. God I fucking hate 2016. This site should have always been an obscure indonesian basket weaving forum.

Anonymous

Anonymous Sun 16 Sep 2018 01:10:32 No.10005711 Report

Quoted By: >>10006220

>cluster point
>accumulation point
>adherent point
>limit point
>condensation point
>sometimes used interchangeably, sometimes some are special types of others, some are used only when studying metric spaces, some are used only when studying the real line

WHY ARE TOPOLOGISTS SO FUCKING AUTISTIC

Anonymous

Anonymous Sun 16 Sep 2018 01:13:52 No.10005718 Report

Quoted By: >>10005728 >>10005734 >>10005771

Hey guys, hopefully someone can help

I'm struggling really badly in real analysis 1. The problem I have is I have abslutely no idea how to start manipulating expressions and equations to get to the desired result. Does anyone have advice regarding that? Should I start with the desired result and work backward?

For example: A simple case.

Prove n^2 > n+1 for n>=2 by induction

I know to start with n=2. That's easy

And I know I must show that (n+1)^2 > (n+1)+1. But I don't know how to get that. Is this supposed to be the easy part? Or is it supposed to be hard?

Anonymous

Anonymous Sun 16 Sep 2018 01:18:52 No.10005728 Report

Quoted By: >>10005752

>>10005718
You want to deduce the thing you are trying to prove from the induction hypothesis.
You know that n^2 > n+1
You want to show that (n+1)^2 > (n+1)+1
Is there some way of manipulating this so that terms from the thing you know appear in it? (hint: try expanding)

Anonymous

Anonymous Sun 16 Sep 2018 01:21:20 No.10005734 Report

Quoted By: >>10005771

>>10005718
It doesn't really matter which way you work. A good strategy can sometimes be to manipulate both sides and try meet in the middle. In this case I think it's easier to work backwards from what you are trying to prove though.

Anonymous

Anonymous Sun 16 Sep 2018 01:36:21 No.10005752 Report

Quoted By:

>>10005728
this is it, use induction hypothesis

Anonymous

View Same Google iqdb SauceNAO ss (2018-09-16 at 01.38.18).png, 248KiB, 1840x613

Anonymous Sun 16 Sep 2018 01:39:45 No.10005758 Report

Quoted By: >>10005771 >>10005775

Is this readable?

Also I feel this proof could've been a lot shorter

Anonymous

Anonymous Sun 16 Sep 2018 01:43:28 No.10005766 Report

Quoted By: >>10005770

so in signals, if you have P_inf then E_inf must also be true right?
P = power, E = Energy

Anonymous

View Same Google iqdb SauceNAO 12314536465785484848.png, 424KiB, 640x894

Anonymous Sun 16 Sep 2018 01:44:24 No.10005770 Report

Quoted By: >>10005773

>>10005766
go ask the engineers

Anonymous

Anonymous Sun 16 Sep 2018 01:44:55 No.10005771 Report

Quoted By:

>>10005718
This: >>10005734

Manipulate both sides, see what you can get from it. Sometimes you can actually go full backwards because of propositions being equivalent. Example: Trying to prove that if n > 1, then 2n > n+1.

Sometimes you cant't go completely backwards. For instance, in your problem, if you work backwards you may get to the inequality "n(n+1) > 1", which is obviously not equivalent to the proposition "n is a natural number". But, starting from the assumption that "n is a natural number", you can get to the inequality "n(n+1) > 1", and what you have done here is manipulating and meeting "both sides".

This method of problem solving is highly used even in more "advanced" mathematical courses, and is a fundamental tool in mathematical thinking (most proofs from elementary set theory can be tried this way for example).

For more info on what I and other anons are trying to explain check out How to Prove It by Velleman.

>>10005758
Guess you're asking for redaction, but fix that spacing on god

Anonymous

Anonymous Sun 16 Sep 2018 01:45:30 No.10005773 Report

Quoted By:

>>10005770
haha n1 meme now answer my question

Anonymous

Anonymous Sun 16 Sep 2018 01:46:41 No.10005775 Report

Quoted By:

>>10005758
Maybe explain at the top that you're breaking into those cases and why they cover everything?
I've never done graph theory so it might be super obvious and not necessary.

Anonymous

View Same Google iqdb SauceNAO ss (2018-09-16 at 01.51.41).png, 204KiB, 857x916

Anonymous Sun 16 Sep 2018 01:53:09 No.10005782 Report

Quoted By:

version 2

I'm not sure if I have to prove basic combinatorics such as the pigeonhole principle in detail here

Anonymous

Anonymous Sun 16 Sep 2018 01:54:02 No.10005783 Report

Quoted By: >>10007816

any recommendation for a more practical approach to lineal algebra? not that i don't understand shit like axler, but i'm in a memengineering course and i don't think studying theoretical stuff will help me in the finals.

Anonymous

View Same Google iqdb SauceNAO why are these two different.png, 29KiB, 753x554

Anonymous Sun 16 Sep 2018 02:37:33 No.10005841 Report

Quoted By: >>10005850

why are shifts in discrete and continuous different?

Anonymous

Anonymous Sun 16 Sep 2018 02:42:01 No.10005847 Report

Quoted By:

>>10004386
d/da limit from left = 0
d/da limit from right = 0

function is smooth and continuous

Anonymous

Anonymous Sun 16 Sep 2018 02:48:01 No.10005850 Report

Quoted By: >>10005856

>>10005841
It depends on the shifting value. It is implied in the figures that no is positive and t0 is negative

Anonymous

Anonymous Sun 16 Sep 2018 02:51:53 No.10005856 Report

Quoted By:

>>10005850
oh t_0 < 0 so t - t_0 would be t + |t_0|

Anonymous

Anonymous Sun 16 Sep 2018 06:10:16 No.10006104 Report

Quoted By:

Test

Anonymous

Anonymous Sun 16 Sep 2018 06:52:16 No.10006185 Report

Quoted By:

>>10005531
I used to be in an ENS too, I went to X for my PhD

Anonymous

Anonymous Sun 16 Sep 2018 06:59:51 No.10006220 Report

Quoted By:

>>10005711
Because you have to be precise, which leads to all types of terminology (adherent point <> limit point <> cluster point). All of these make sense for metric spaces.
Now for the reason why there are redundancies, I am guessing that some people calqued directly from french (eg accumulation point) and others used a more anglo terminology (eg. cluster point). This or the french translated the terms and it became a standard even in the anglo saxon world

Anonymous

Anonymous Sun 16 Sep 2018 08:36:34 No.10006338 Report

Quoted By:

>>10005597
>you will never study at a top uni
>you will forever be mediocre

Anonymous

Anonymous Sun 16 Sep 2018 09:05:42 No.10006368 Report

Quoted By: >>10007112 >>10007564 >>10007571

I greatly enjoy watching more old-school math documentaries like the following:

https://www.youtube.com/watch?v=ObPg3ki9GOI (The Birth of Calculus).

Generally speaking something calmer and having more insight than most modern American "documentaries".
Is there something like a playlist or a website with videos like the one I linked or with math lectures more accessible to a layman?

Anonymous

View Same Google iqdb SauceNAO indeed.jpg, 523KiB, 935x977

Anonymous Sun 16 Sep 2018 10:41:48 No.10006496 Report

Quoted By:

>>10004810
i had sex with onee san and gave her the shot
now she carries my seed

Anonymous

View Same Google iqdb SauceNAO 1532941644695.jpg, 181KiB, 750x750

Anonymous Sun 16 Sep 2018 12:14:04 No.10006590 Report

Quoted By: >>10006655

>>10005382

Anonymous

Anonymous Sun 16 Sep 2018 13:01:08 No.10006655 Report

Quoted By:

>>10005382
>>10006590
I basically don't.
I swim 3 times a week and try to rockclimb a bit too but that's a struggle. I don't read at all during the semester. I read genre fiction trash before exams to help relax sometimes but I do all my serious reading in the breaks. I'm a member of a few uni clubs but I generally only attend the first few weeks of a semester.
One thing I do do is watch a bit of french youtube which doesn't feel particularly strenuous but helps me improve my understanding of the language.

Anonymous

Anonymous Sun 16 Sep 2018 13:12:29 No.10006668 Report

Quoted By:

>>10004426
skip topology

Anonymous

Anonymous Sun 16 Sep 2018 13:41:36 No.10006716 Report

Quoted By: >>10006749

What's with the "Lang is a meme" meme?

Anonymous

Anonymous Sun 16 Sep 2018 13:49:54 No.10006730 Report

Quoted By: >>10006751

Could someone perhaps help out with these questions? Cheers.

You have $250,000 for investment. There are 2 securities A and B. You invest 40% in security A and the remaining in security B. The standard deviation of security A is 0.60 while the standard deviation of security B is 0.60. The correlation between the returns on the 2 securities is -0.70. What is the variance of returns of the portfolio?

Question 3 Unsaved
When correlation coefficient between returns on securities j and market returns = -0.60; standard deviation of returns on securities j =14.60% and standard deviation of market returns = 13.60%. What is the beta value of security j ?

To raise $980,000, a company draws up a bill of exchange with a face value of $1,000,000, payable in 170 days. What is the implicit annual market interest rate on the bill?

Question 5 Unsaved
An investor has $1,000,000 to invest. Out of this $1,000,000, she invests $100,000 in asset A, $200,000 in asset B and the remaining in asset C. The beta of asset A is -0.6, the beta of asset B is 0.6 and the beta of asset C is 1.1. What is the beta of the portfolio?

ABC Ltd is currently paying a dividend of $3 per share. If investors expect this dividend to be maintained forever and require a rate of return of 7 percent on the investment. What is the value of each ABC share today?

Anonymous

Anonymous Sun 16 Sep 2018 14:01:11 No.10006749 Report

Quoted By: >>10006760

>>10006716
It's baseless propaganda by Rudincucks, Alfohrscucks, Artincucks, etc.

Anonymous

Anonymous Sun 16 Sep 2018 14:01:34 No.10006751 Report

Quoted By:

>>10006730
What have you tried? These all should be straight forward from the definitions. Go back to your notes and look at the definitions of the things you are asked to provide.
>Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework

Anonymous

Anonymous Sun 16 Sep 2018 14:07:17 No.10006760 Report

Quoted By: >>10006765

>>10006749
>Rudincucks
Rudin is a meme too.

Anonymous

Anonymous Sun 16 Sep 2018 14:09:54 No.10006765 Report

Quoted By: >>10006768

>>10006760
So who's an example of a good author?

Anonymous

Anonymous Sun 16 Sep 2018 14:11:27 No.10006768 Report

Quoted By: >>10006777 >>10006779

>>10006765
>So who's an example of a good author?
Riehl

Anonymous

Anonymous Sun 16 Sep 2018 14:16:45 No.10006777 Report

Quoted By: >>10006785

>>10006768
>Riehl
Made for rape.

Anonymous

View Same Google iqdb SauceNAO riehl2.jpg, 14KiB, 384x383

Anonymous Sun 16 Sep 2018 14:17:52 No.10006779 Report

Quoted By: >>10006781

>>10006768
I was reading her category theory in context the other day because someone here mentioned it. Doesn't seem too bad desu

Anonymous

Anonymous Sun 16 Sep 2018 14:18:47 No.10006780 Report

Quoted By: >>10006790 >>10007564

Is this book any good for learning real analysis?
https://www.amazon.com/Calculus-Complete-Course-Robert-Adams/dp/0134154363

Anonymous

Anonymous Sun 16 Sep 2018 14:19:06 No.10006781 Report

Quoted By: >>10006784

>>10006779
>her
Riehl identifies as a "him".

Anonymous

Anonymous Sun 16 Sep 2018 14:19:52 No.10006784 Report

Quoted By: >>10006989

>>10006781
Proofs?

Anonymous

Anonymous Sun 16 Sep 2018 14:19:57 No.10006785 Report

Quoted By:

>>10006777
God will it.

Anonymous

Anonymous Sun 16 Sep 2018 14:21:30 No.10006790 Report

Quoted By: >>10006808

>>10006780
>Is this book any good for learning real analysis?
Why don't you read it and find out?

Anonymous

Anonymous Sun 16 Sep 2018 14:29:56 No.10006808 Report

Quoted By:

>>10006790
Because I'm hoping someone with more experience can save me effort down a bad path,
and because I think it looks like a silly book to learn real analysis from given that it's *very much* a calculus book.

Anonymous

Anonymous Sun 16 Sep 2018 14:33:00 No.10006818 Report

Quoted By: >>10006820

How do I prove it doesn't matter whether or not I have an open or closed interval in the definition of zero content?

Anonymous

Anonymous Sun 16 Sep 2018 14:34:48 No.10006820 Report

Quoted By: >>10006853

>>10006818
>How do I prove it doesn't matter whether or not I have an open or closed interval in the definition of zero content?
define "zero content"

Anonymous

Anonymous Sun 16 Sep 2018 14:38:42 No.10006832 Report

Quoted By: >>10007817

any recent research on the category of axioms?

Anonymous

Anonymous Sun 16 Sep 2018 14:46:13 No.10006853 Report

Quoted By: >>10006874 >>10006914 >>10006926

>>10006820
Let $A\subseteq \mathbb{R}$ . $A$ is said to have zero content if for all $\epsilon > 0$ there exists a finie collection of closed intervals, $I_{1}, \dots , I_{n}$ such that: $\displaystyle A \subseteq \bigcup_{n=1}^{N} I_{n}$
and $\displaystyle \sum_{i=1}^{N} | I_{n} | < \epsilon$ .

Anonymous

Anonymous Sun 16 Sep 2018 14:48:22 No.10006856 Report

Quoted By: >>10006862 >>10006864 >>10007430

The sad thing about studying math is that youll never have that "yo let's cook" moment even after you got a phd in maths and spent 4 weeks looking for the best rope. Your dog looks at you with his starved eyes and most you can manage is yo lets multiply these 2 really big numbers and after that rape someone. Really takes a toll on you

Anonymous

Anonymous Sun 16 Sep 2018 14:51:36 No.10006862 Report

Quoted By:

>>10006856
Nice projections.

Anonymous

View Same Google iqdb SauceNAO b32.jpg, 115KiB, 500x410

Anonymous Sun 16 Sep 2018 14:52:35 No.10006864 Report

Quoted By:

>>10006856
>The sad thing about studying math is that youll never have that "yo let's cook" moment even after you got a phd in maths and spent 4 weeks looking for the best rope. Your dog looks at you with his starved eyes and most you can manage is yo lets multiply these 2 really big numbers and after that rape someone. Really takes a toll on you

Anonymous

Anonymous Sun 16 Sep 2018 14:56:47 No.10006874 Report

Quoted By: >>10006926

>>10006853
The second condition should hold true regardless of the interval, but the first condition I'm not sure. It seems like it should 'just work' but I can't formalize it.

Anonymous

Anonymous Sun 16 Sep 2018 15:14:53 No.10006914 Report

Quoted By:

>>10006853
Go through the definition and think about what happens to the complement.

Anonymous

Anonymous Sun 16 Sep 2018 15:20:30 No.10006926 Report

Quoted By: >>10006958

>>10006874
>>10006853
Assume the definition with closed intervals holds. You are given epsilon. Take a closed covering such that the total length of the covering is less than epsilon/2. Then substitute each closed interval with an open interval which contains the original closed interval and whose length is bigger by epsilon/2n. You obtain an open covering with length less than epsilon. The other direction is trivial.

Anonymous

Anonymous Sun 16 Sep 2018 15:36:04 No.10006958 Report

Quoted By: >>10006985

>>10006926
Thanks

Anonymous

Anonymous Sun 16 Sep 2018 15:49:10 No.10006985 Report

Quoted By: >>10007229

>>10006958
no prob buddy

Anonymous

View Same Google iqdb SauceNAO good one.png, 169KiB, 600x514

Anonymous Sun 16 Sep 2018 15:52:38 No.10006989 Report

Quoted By:

>>10006784
LOL

Anonymous

View Same Google iqdb SauceNAO 1531446386641.png, 28KiB, 200x300

Anonymous Sun 16 Sep 2018 15:56:08 No.10006994 Report

Quoted By:

>non-constructive mathematics

Anonymous

Anonymous Sun 16 Sep 2018 16:21:45 No.10007060 Report

Quoted By: >>10007118 >>10007564

any good books about calculus?

Anonymous

Anonymous Sun 16 Sep 2018 16:42:50 No.10007110 Report

Quoted By: >>10007133

I have the following problem about matrices:
Let $A$ and $B$ be matrices such that $AB = BA = 0$ . If $A + B$ is invertible, is $A - B$ invertible?
I can't find any counterexamples, mostly because I find it hard to find such matrices. I am inclined to believe it is true because if $A$ is $2*2$ and idempotent and $B = I - A$ , $A - B$ is invertible.
But I have no idea how to prove it. Any pointers?

Anonymous

Anonymous Sun 16 Sep 2018 16:43:05 No.10007112 Report

Quoted By:

>>10006368

anybody?

Anonymous

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Anonymous Sun 16 Sep 2018 16:47:31 No.10007118 Report

Quoted By: >>10007125

>>10007060

Anonymous

Anonymous Sun 16 Sep 2018 16:55:48 No.10007125 Report

Quoted By:

>>10007118
calm down ping ling, i wont steal your 300k job

Anonymous

Anonymous Sun 16 Sep 2018 17:01:09 No.10007133 Report

Quoted By: >>10007271

>>10007110
Hint: Consider (A + B)^2 and (A - B)^2

Anonymous

Anonymous Sun 16 Sep 2018 17:30:52 No.10007201 Report

Quoted By:

>>10002027
>2nd for: French universities are the best in the world.
Why not German?

Anonymous

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Anonymous Sun 16 Sep 2018 17:40:29 No.10007229 Report

Quoted By:

>>10006985
How exactly do you "substitute" the closed for open?

Anonymous

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Anonymous Sun 16 Sep 2018 17:41:37 No.10007231 Report

Quoted By: >>10007259

>take real analysis course
>instructor does zero teaching
>homework presentations everyday where students basically teach the class

just kill me boys, any tips on self studying real analysis

Anonymous

Anonymous Sun 16 Sep 2018 17:57:13 No.10007259 Report

Quoted By:

>>10007231
That problem is trivial. Just treat the partial sequences as cauchy sequences and show there is only one per equivalence class. Contradiction should work, assume 2 distinct are in the same class but there exists an epsilon which separates the sequences. Use absolute value metric.

Anonymous

Anonymous Sun 16 Sep 2018 18:02:33 No.10007271 Report

Quoted By: >>10007279 >>10007330

>>10007133
>Consider (A + B)^2 and (A - B)^2
How did you come up with that, holy shit.

$(A + B)^2 = (A - B)^2 \quad \Rightarrow \quad [det(A + B)]^2 = [det(A - B)]^2$
From this we can conclude that:
$det(A - B) = det(A + B) \neq 0 \qquad \vee \qquad det(A - B) = -det(A + B) \neq 0$
In both cases, the determinant of $A - B$ is not zero, so the matrix is invertible

Is that a good proof or do you think that there is a better way to do it?

Anonymous

Anonymous Sun 16 Sep 2018 18:06:47 No.10007279 Report

Quoted By: >>10007330

>>10007271
I'm not the anon who suggested, but it is very natural. You have a product formula on an algebra which has a sum and product and you want to make a statement about sums. So cosider multiplying the sums to see if your given product appears. This is more of a general algebraic technique than matrices in particular.

Anonymous

Anonymous Sun 16 Sep 2018 18:10:18 No.10007285 Report

Quoted By: >>10007308 >>10007512 >>10007834 >>10008110

I'm supposed to generate a prime p such that p-1 doesn't factor into a product of small primes. Could you guys help me ?

Anonymous

Anonymous Sun 16 Sep 2018 18:19:22 No.10007308 Report

Quoted By: >>10007340

>>10007285
You don't.

Anonymous

Anonymous Sun 16 Sep 2018 18:23:39 No.10007319 Report

Quoted By:

>>10005572
Based and redpilled.

Anonymous

Anonymous Sun 16 Sep 2018 18:24:42 No.10007323 Report

Quoted By:

>>10005613
Cry more söygöy.

Anonymous

Anonymous Sun 16 Sep 2018 18:27:33 No.10007330 Report

Quoted By:

>>10007271
What >>10007279 said.
Your proof is good enough but you could also find the inverse of A - B in terms of the inverse of A + B by multiplying both sides of your first equation by the square of (A + B)^(-1). The advantage of this solution is that it's completely algebraic, so it holds even if A and B are from an arbitrary ring.

Anonymous

Anonymous Sun 16 Sep 2018 18:28:02 No.10007333 Report

Quoted By: >>10007698

Why is it so filled with french mathfags, are they even french or richfags from other 3rd world countries that couldn't get into american universities?

They certainly look like a loud minority.

Anonymous

Anonymous Sun 16 Sep 2018 18:29:51 No.10007340 Report

Quoted By:

>>10007308
Why ?

Anonymous

Anonymous Sun 16 Sep 2018 18:45:07 No.10007369 Report

Quoted By: >>10007372 >>10007524

It seems clear to me that if you have Riemann integrability on a closed bounded interval, when increase the number of points in a partition, $L(f,P) \leq L(f,Q) \leq L(f,Q^{*}) \leq \cdots \leq L(f) \leq U(f) \leq \cdots \leq U(f,Q^{*}), U(f,Q), U(f,P)$ , for partition and refinements $P, Q, Q^{*}$ , etc, but how do I formalize this in context of the $\epsilon$ -criteria for integration: $U(f,P)-L(f,P) < \epsilon$ for $\epsilon >0$ .

Anonymous

Anonymous Sun 16 Sep 2018 18:47:02 No.10007372 Report

Quoted By:

>>10007369
meant to put this in /sqt/, but oh well have at it if you want.

Anonymous

Anonymous Sun 16 Sep 2018 18:58:53 No.10007388 Report

Quoted By: >>10007395 >>10007421

How does one show that \left (\mathbb{N}, < ) is pairwise non-isomorphic with \left (\mathbb{Z}, < )

Anonymous

Anonymous Sun 16 Sep 2018 18:59:55 No.10007395 Report

Quoted By:

>>10007388
>How does one show that [code:lit]\left (\mathbb{N}, < ) [/code:lit] is pairwise non-isomorphic with [code:lit]\left (\mathbb{Z}, < )[/code:lit]

Anonymous

Anonymous Sun 16 Sep 2018 19:13:57 No.10007421 Report

Quoted By: >>10007436

>>10007388
N has a least element, Z does not (also pairwise is kind of silly when there is only one pair)

Anonymous

View Same Google iqdb SauceNAO IMG_2363.jpg, 64KiB, 400x267

Anonymous Sun 16 Sep 2018 19:17:44 No.10007430 Report

Quoted By:

>>10006856
Is that a Breaking Bad reference ? What are you complaining about exactly ?

Anonymous

Anonymous Sun 16 Sep 2018 19:19:51 No.10007436 Report

Quoted By: >>10007444 >>10007452

>>10007421
I guess I'm having trouble formally constructing a proof given the definition of an isomorphism as S: v -> f(v).

How do I state this more formally? I'm also trying to prove this for (Q, <) and (N, <) -- forgot to remove the pairwise. Once I know how to do it for one, I was going to follow the same steps.

Anonymous

Anonymous Sun 16 Sep 2018 19:24:17 No.10007444 Report

Quoted By:

>>10007436
Find a set in Z or Q that does not have a least element.

Anonymous

Anonymous Sun 16 Sep 2018 19:27:39 No.10007452 Report

Quoted By: >>10007881

>>10007436
Well assume that there were indeed an isomorphism f: N -> Z. Then, f(1) is the least element of Z. Indeed, if n is in Z, then there is an n' in N such that f(n') = n. Then, since 1 <= n', we must have f(1) <= f(n') = n, hence n >= f(1). Hence f(1) <= f(1) - 1, a contradiction.
Basically, what you must understand is that saying that two structures are isomorphic means that they are essentially the same (ie. any property that is preserved by morphisms must be shared by the two structure).
Similarly, you can find a property of the order on Q that is not shared with Z or N, which implies that it cannot be isomorphic to either (by an argument that resembles the above).

Anonymous

Anonymous Sun 16 Sep 2018 19:34:49 No.10007463 Report

Quoted By:

>>10002739
Based. Only beta cucks disagree

Anonymous

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Anonymous Sun 16 Sep 2018 19:38:10 No.10007467 Report

Quoted By:

>>10004668
The pic is implying that the retard on the left will never even begin to comprehend what "machine learning" actually is.

Anonymous

Anonymous Sun 16 Sep 2018 19:56:20 No.10007512 Report

Quoted By:

>>10007285
2

Anonymous

Anonymous Sun 16 Sep 2018 20:00:03 No.10007524 Report

Quoted By: >>10007566

>>10007369
For all epsilon > 0 there exists partitions such that blah blah blah

Anonymous

Anonymous Sun 16 Sep 2018 20:04:07 No.10007534 Report

Quoted By:

How do I deal with not being intelligent in a nonlethal way? My sixteen year old sister is probably smarter than me. I wish I weren't a brainlet.

Anonymous

Anonymous Sun 16 Sep 2018 20:06:26 No.10007537 Report

Quoted By: >>10007562

>>10002693
based and redpilled

Anonymous

Anonymous Sun 16 Sep 2018 20:07:52 No.10007542 Report

Quoted By: >>10007557

How easy is it to get a CS/programming job with a math undergrad degree? Is it worth double majoring in CS just to secure jobs?

Anonymous

Anonymous Sun 16 Sep 2018 20:10:33 No.10007557 Report

Quoted By:

>>10007542
samefag and I'm gonna say yes, and not to take advice from competitive strangers on the internet

good luck you handsome devil you

Anonymous

Anonymous Sun 16 Sep 2018 20:12:48 No.10007562 Report

Quoted By:

>>10007537
i hate you

Anonymous

Anonymous Sun 16 Sep 2018 20:13:08 No.10007564 Report

Quoted By: >>10007571

>>10006368
I like this one for the personal story it tells, quite romantic
https://www.dailymotion.com/video/x1btavd
https://www.youtube.com/watch?v=Y7Ufxl-zSRI
Same with
While not really what people think of as a documentary I still like showing this to people, it's usually enjoyable for everyone.
https://www.youtube.com/watch?v=U_ZHsk0-eF0
>>10005382
I experimented until I found the best time of day, location, and method for studying, at least for me. I go to the library early in the morning after exercising and eating. Regular exercise will help you immensely actually, at least it did for me, same with changing your diet. It's really fucking obvious hindsight. I read a few articles and books that really helped me learn what my "style" was when it came to studying and doing math as well.
>>10006780
People shit on Rudin but I like it. Tao is good, same with Simon for his early chapters. I've heard good things about Rosenlicht and Pugh. Jost book was nice as a second course, maybe it could be used as a first course.
>>10007060
https://en.wikipedia.org/wiki/Calculus_Made_Easy

Anonymous

Anonymous Sun 16 Sep 2018 20:14:30 No.10007566 Report

Quoted By: >>10007763

>>10007524
Yes, but what kind of partition.

Anonymous

Anonymous Sun 16 Sep 2018 20:16:29 No.10007571 Report

Quoted By:

>>10006368
>>10007564
You what, I'm gonna modify my answer, if you wanna learn about the really cool stories or mathematics and mathematicians then you're better looking for various texts and articles rather than documentaries. Here's an example
https://www.ams.org/notices/200503/fea-weil.pdf

Anonymous

Anonymous Sun 16 Sep 2018 21:10:26 No.10007698 Report

Quoted By:

>>10007333
The language of mathematics has been French since Descartes anon. For the last 500 years most great mathematicians have been French with the occasional German, Englishman and Russian thrown in.

Anonymous

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Anonymous Sun 16 Sep 2018 21:47:46 No.10007763 Report

Quoted By:

>>10007566
>but what kind of partition
The explicit form of the partition depends on the function mate. Have you never done any analysis proofs at all?

Anonymous

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Anonymous Sun 16 Sep 2018 22:17:19 No.10007803 Report

Quoted By: >>10011571

>>10004905

Anonymous

Anonymous Sun 16 Sep 2018 22:21:42 No.10007816 Report

Quoted By:

>>10005783
Strang(le yourself)

Anonymous

Anonymous Sun 16 Sep 2018 22:22:50 No.10007817 Report

Quoted By:

>>10006832
still no definite answer on what the morphisms are

Anonymous

Anonymous Sun 16 Sep 2018 22:28:35 No.10007834 Report

Quoted By: >>10007916

>>10007285
every number is either a prime or a factor of small primes or 1. So if p-1 doesn't factor into a product of small primes, then it must be prime or 1. If the former, then p must be 3, if the latter, it must be 2.

Anonymous

Anonymous Sun 16 Sep 2018 22:39:51 No.10007881 Report

Quoted By:

>>10007452
This is great, thank you.

Anonymous

Anonymous Sun 16 Sep 2018 22:57:05 No.10007916 Report

Quoted By: >>10007986

>>10007834
104723 - 1 = 2 * 52361

Anonymous

Anonymous Sun 16 Sep 2018 23:33:02 No.10007986 Report

Quoted By:

>>10007916
retard

Anonymous

Anonymous Sun 16 Sep 2018 23:36:05 No.10007992 Report

Quoted By:

>>10004514
While it's common practice, and while it helps with computation, a basis does not have to be normalized in general. All a basis is is a set of linearly independent vectors that span the space. The traditional {i, j, k} = {<1, 0, 0>, <0, 1, 0>, <0, 0, 1}>} is a basis for R_3 because no vector in the basis is a linear combination of the others, and every vector in R_3 can be written as a linear combination of these vectors, i.e. v = a_1 * i + a_2 * j + a_3 * k for any v in R_3. However, this also means the modified basis anon gave, {i*, j, k} where i* = <2, 0, 0> and j and k are the same is also a basis. i* is a constant times i, so it should be pretty clear from a contradiction argument that i* cannot be written as a linear combination of j and k. At the same time, any vector in R_3 can be written as a linear combination of this modified basis, constructively from the coefficients a_1, a_2, a_3 for v in the {i, j, k} basis, as v = a*_1 * i* + a_2 * j + a_3 * k = (a_1 / 2) * i* + a_2 * j + a_3 * k for any v in R_3.

All that being said, all that noise anon was saying about dotting bases and tensors is garbage, and indicates a fundamental misunderstanding of the subject.

Anonymous

Anonymous Sun 16 Sep 2018 23:42:48 No.10008000 Report

Quoted By:

Logic Question:

given some model, M, and some sentence, s, and a is an M-assignment, then how can I show that if M ? s[a] then M ? s[a] for all truth-assignments/evaluations, a?

Seems to be induction on terms/formulas by the definition of assignments, but unclear on the base case. Any insight?

Anonymous

Anonymous Mon 17 Sep 2018 00:30:30 No.10008081 Report

Quoted By:

>>10005382
There are 168 hours in a week. If you get 6 hours of sleep a night and spend about 3 hours on busy work (eating, self care, cleaning), that's still over 100 hours to yourself. If 40 hours of studying leaves you with "just the weekend," you're doing something wrong.

Anonymous

View Same Google iqdb SauceNAO 42698574.jpg, 3KiB, 126x38

Anonymous Mon 17 Sep 2018 00:40:33 No.10008099 Report

Quoted By: >>10008178

>>10004905
Any Melbourne kids here?

Anonymous

Anonymous Mon 17 Sep 2018 00:44:23 No.10008110 Report

Quoted By:

>>10007285
Download any cryptography library for your favorite programming language. The cardinalities of any finite groups used for DH, RSA, ECC, will be such numbers.

Anonymous

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Anonymous Mon 17 Sep 2018 00:56:59 No.10008135 Report

Quoted By:

>>10004905
Not the best international ranking, but I do enjoy it here

Anonymous

Anonymous Mon 17 Sep 2018 01:19:50 No.10008178 Report

Quoted By: >>10008277

>>10008099
I know a bunch of people at Melbourne.
Is it true you guys only have one algebra course?

Anonymous

Anonymous Mon 17 Sep 2018 01:30:11 No.10008206 Report

Quoted By:

>>10004753
It can be identified by its universal property..... So yes it's unique.

Anonymous

Anonymous Mon 17 Sep 2018 01:35:42 No.10008216 Report

Quoted By:

>>10005510
Idk but in my school vector is well vectors. Multivar is tensors (and some representation theory for some reason) and manifolds is well manifolds. So vectors really just are matrices and shit. Multivar is learn what tensors are and look at general linear mappings/modules etc. Manifolds is define the exterior product/exterior derivative get to the integral form and greens theorem (tangentbundles etc too).

Anonymous

Anonymous Mon 17 Sep 2018 02:21:30 No.10008277 Report

Quoted By: >>10008903

>>10008178
It appears so, but I'm a second year, so I wouldn't know

Anonymous

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Anonymous Mon 17 Sep 2018 02:24:58 No.10008283 Report

Quoted By:

Anyone have Wolfram pro? Can you type this in and tell me if it gives an answer. I know the answers are ~-151 and~91, but I want to see if Wolfram comes up with something exact.

solve for x: 2*5*7577/77/77-ln(77-74)+2ln(77)-ln(74+77)=tanh^2(5x/77+atanh(74/77))+2*ln(cosh(5x/77+atanh(74/77)))

Anonymous

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Anonymous Mon 17 Sep 2018 03:23:50 No.10008378 Report

Quoted By:

You know when people say ‘Marco’ you say ‘Polo’? It’s like that but with ‘Probability Theory’ and ‘Fun’.

Anonymous

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Anonymous Mon 17 Sep 2018 03:33:13 No.10008388 Report

Quoted By:

TEH WHITE

Anonymous

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Anonymous Mon 17 Sep 2018 06:00:29 No.10008652 Report

Quoted By:

Hello. What's the best functional analysis book to learn from after I learn higher level real analysis (so measure theory, etc)? All the better if it treats variational calculus.

Anonymous

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Anonymous Mon 17 Sep 2018 06:02:50 No.10008655 Report

Quoted By:

>tfw I thought I was a hopeless dummy in my honors analysis class but it actually turns out everyone just copies people's answers from MO and the solution manual while I try hours to find elegant solutions

Will I be ok?

Anonymous

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Anonymous Mon 17 Sep 2018 06:09:58 No.10008665 Report

Quoted By:

>>10004905
UofT
>>10004912
What year?

Anonymous

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Anonymous Mon 17 Sep 2018 06:38:46 No.10008704 Report

Quoted By: >>10008718 >>10008969

>tfw I can't grasp the difference between a N-dimensional array and a tensor

Anonymous

Anonymous Mon 17 Sep 2018 06:53:28 No.10008718 Report

Quoted By: >>10008772

>>10008704
They are isomorphic. A matrix is a representation of a linear transformation.

Anonymous

Anonymous Mon 17 Sep 2018 07:04:07 No.10008738 Report

Quoted By: >>10008767

>>10002000
sometimes I look in these threads, but since I'm doing combinatorics it feels like I don't really have much in common with the topological/algebraic oriented population. does this reflect the actual hierarchy in mathematics?

Anonymous

Anonymous Mon 17 Sep 2018 07:22:12 No.10008767 Report

Quoted By:

>>10008738
Combinatorists are more or less shunned since what they find interesting about certain objects (say, Banach spaces) is not what people studying those objects (functional analysists in this case) find interesting.

Anonymous

Anonymous Mon 17 Sep 2018 07:29:04 No.10008772 Report

Quoted By: >>10008829

>>10008718
Is this the same meaning as "the matrix of an endomorphism is isometric"?

Anonymous

Anonymous Mon 17 Sep 2018 08:07:12 No.10008829 Report

Quoted By: >>10008851

>>10008772
No?

Anonymous

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Anonymous Mon 17 Sep 2018 08:24:13 No.10008851 Report

Quoted By:

>>10008829
Tensors might be as far as my brain can go :(

Anonymous

Anonymous Mon 17 Sep 2018 09:03:00 No.10008903 Report

Quoted By:

>>10008277
I'm in second year and doing algebra 3 (algebraic number theory).
Which courses are you doing at Melbourne?

Anonymous

Anonymous Mon 17 Sep 2018 09:54:04 No.10008969 Report

Quoted By:

>>10008704
There is none

Anonymous

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Anonymous Mon 17 Sep 2018 10:16:25 No.10008992 Report

Quoted By:

>>10004905

Anonymous

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Anonymous Mon 17 Sep 2018 12:40:49 No.10009189 Report

Quoted By: >>10009285 >>10009409 >>10009433 >>10012015

If I want to prove the Riemann Hypothesis, which areas of mathematics should I focus on? Analytic Number Theory and Complex Analysis?

Anonymous

Anonymous Mon 17 Sep 2018 13:34:12 No.10009285 Report

Quoted By: >>10010077

>>10009189
The Riemann hypothesis has been scrutinized enough that's its likely the result will come from a field that hasn't been developed yet.

Anonymous

Anonymous Mon 17 Sep 2018 13:47:27 No.10009304 Report

Quoted By: >>10009325 >>10012302

>trying to read paper
>it's an illegible low-quality scan
If my department had the funding I'd pay undergrads to retypeset these in latex

Anonymous

Anonymous Mon 17 Sep 2018 14:02:33 No.10009325 Report

Quoted By: >>10012302

>>10009304
Do it yourself and become a modern day manuscript-preserving monk.

Anonymous

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Anonymous Mon 17 Sep 2018 14:21:26 No.10009358 Report

Quoted By: >>10009364 >>10009372

I have my qual today. Send me your energy, /mg/.

Anonymous

View Same Google iqdb SauceNAO good luck anon.png, 25KiB, 300x276

Anonymous Mon 17 Sep 2018 14:23:27 No.10009364 Report

Quoted By:

>>10009358
you're gonna make it anon

Anonymous

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Anonymous Mon 17 Sep 2018 14:29:29 No.10009372 Report

Quoted By:

>>10009358
Good luck.

Anonymous

Anonymous Mon 17 Sep 2018 14:55:47 No.10009409 Report

Quoted By: >>10010077 >>10012137

>>10009189
Algebraic Geometry

Anonymous

Anonymous Mon 17 Sep 2018 15:11:12 No.10009431 Report

Quoted By: >>10009479

I'm currently finishing and engineering undergrad and to be honest I don't like it, I just enjoyed the math courses I took. So, obviously, my knowledge of math doesn't go beyond fourier analysis and vectorial calculus. Is it possible for me to continue studying math ?

Anonymous

Anonymous Mon 17 Sep 2018 15:11:44 No.10009433 Report

Quoted By: >>10010077 >>10012137

>>10009189
mathematical physics

Anonymous

Anonymous Mon 17 Sep 2018 15:19:53 No.10009449 Report

Quoted By: >>10009631

disk method theorist

Anonymous

Anonymous Mon 17 Sep 2018 15:42:17 No.10009479 Report

Quoted By: >>10009628

>>10009431
Have you done any proofs-based classes?

Anonymous

Anonymous Mon 17 Sep 2018 17:08:31 No.10009612 Report

Quoted By: >>10009627

>be in first year of math at low tier eurofag university
>want to get into an MSc program at a good/great university
>afraid good grades aren't going to cut it when the name recognition of my university is almost nonexistent
Should I try to transfer out next year? When should I start talking to advisors about master's programs?

Anonymous

Anonymous Mon 17 Sep 2018 17:17:27 No.10009627 Report

Quoted By:

>>10009612
I am at a top 150 math program, so good but not great. (Physics dept at my school is top 50, a lot of mathfags work with them.) A lot of people here come from engineering background or physics. Also a lot of people come from no name places. I would say it like this:
Your work is more important than your school, but a big name school has more opportunities for interesting work. It is still possible to get in somewhere good, but some people have an advantage.

Anonymous

Anonymous Mon 17 Sep 2018 17:17:47 No.10009628 Report

Quoted By:

>>10009479
No, I haven't taken that courses

Anonymous

Anonymous Mon 17 Sep 2018 17:18:32 No.10009631 Report

Quoted By:

>>10009449
>tfw too brainlet for rigorous disk method theory

Anonymous

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Anonymous Mon 17 Sep 2018 18:46:43 No.10009812 Report

Quoted By: >>10009830

I don't understand the notation of this equation:
(x, y, z) = 1
Further down there's also (u, v) = 1.

Anonymous

Anonymous Mon 17 Sep 2018 18:53:42 No.10009830 Report

Quoted By: >>10009833

>>10009812
I think it's supposed to be the gcd of these numbers.

Anonymous

Anonymous Mon 17 Sep 2018 18:55:03 No.10009833 Report

Quoted By:

>>10009830
cheers, that makes sense

Anonymous

Anonymous Mon 17 Sep 2018 19:12:01 No.10009875 Report

Quoted By:

>>10004905
Already finished my degrees

Anonymous

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Anonymous Mon 17 Sep 2018 20:14:01 No.10010035 Report

Quoted By: >>10010460

Okay guys i have no idea about:
>e, logarothmic, sinus / cosinus functions
>have never done anything with vectors / matrix
>Never had any physics classes

and i'm going to study applied math and physics in a couple of weeks, how fucked am i? I've always wanted to get into cosmology / astronomy or anything related to research, which is why i decided to study these fields, but i'm already scared to death by the upcomming analysis 1&2 and linear algebra classes. Are they going to be hard for someone like me?

Pic related are going to be my classes in the upcomming first and second semester

Anonymous

Anonymous Mon 17 Sep 2018 20:27:35 No.10010077 Report

Quoted By: >>10010084

>>10009285
I want an objective answer, motherfucker.
>>10009409
>>10009433
I don't get sarcasm, so are you guys being serious or just sarcastic towards me?

Anonymous

Anonymous Mon 17 Sep 2018 20:29:30 No.10010084 Report

Quoted By: >>10010088

>>10010077
There isn't an objective answer you brainlet, if people had any fucking idea how to prove RH it would have been done by now

Anonymous

Anonymous Mon 17 Sep 2018 20:31:08 No.10010088 Report

Quoted By: >>10010284 >>10011976

>>10010084
But it must related to some field of mathematics, I just wanna know which field that is. From what I know about the RH, it's related to Complex Analysis and Analytic Number Theory.

Anonymous

Anonymous Mon 17 Sep 2018 21:56:27 No.10010281 Report

Quoted By: >>10010454 >>10010565 >>10011985

Do you guys buy the Pajeet (International) Edition of all your textbooks?

Or do you believe in supporting our publishers?

Anonymous

Anonymous Mon 17 Sep 2018 21:57:33 No.10010284 Report

Quoted By:

>>10010088
Its related fields are all just a subset of Computer Science

Anonymous

Anonymous Mon 17 Sep 2018 23:17:30 No.10010454 Report

Quoted By:

>>10010281
>buying

Anonymous

Anonymous Mon 17 Sep 2018 23:19:30 No.10010460 Report

Quoted By:

>>10010035
>Are they going to be hard for someone like me?
You're going to stumble, you'll be okay if you're a generally smart person. The concepts aren't that tough to grasp.

Anonymous

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Anonymous Tue 18 Sep 2018 00:17:21 No.10010565 Report

Quoted By: >>10010600 >>10010603 >>10012127

>>10010281
>buying hundred dollar textbooks while I'm a half-ass broke student with 50k loan

Anonymous

Anonymous Tue 18 Sep 2018 00:42:38 No.10010600 Report

Quoted By:

>>10010565
Those are shitty books.

Anonymous

Anonymous Tue 18 Sep 2018 00:44:04 No.10010603 Report

Quoted By:

>>10010565
Link to that.

Anonymous

Anonymous Tue 18 Sep 2018 03:49:19 No.10011571 Report

Quoted By: >>10012178

>>10007803
are you doing masters? if so, how are things there?

Anonymous

Anonymous Tue 18 Sep 2018 05:42:24 No.10011852 Report

Quoted By: >>10011966 >>10012257

Anyone know the name for the pattern formed in base 10 when you multiply by a prime number, and the last digit of the product follows a cycle of fixed size? Like 0 - 3 - 6 - 9 - 2 - 5 - 8 - 1 - 4 - 7 - 0 - 3 - 6 - 9 for 3, and 0 - 5 - 0 - 5 - 0 for 5, or 0 - 2 - 4 - 6 - 8 - 0 - 2 - 4 for 2. I'm going to fuck around with it in higher bases with bigger primes and see what I get, but I wanted to know if there is more information about it first.

Anonymous

Anonymous Tue 18 Sep 2018 06:39:02 No.10011966 Report

Quoted By:

>>10011852
Interesting question.

Anonymous

Anonymous Tue 18 Sep 2018 06:44:10 No.10011976 Report

Quoted By:

>>10010088
It is a statement that can be phrased in terms of analytic number theory, but as with most "real-life" problems (especially unsolved ones...), it cannot be pinned down to one particular field (not to mention that the mere notion of "field of mathematics" becomes increasingly vague as you learn more about math).
It has been studied extensively from various points of view: analytic number theory, algebraic geometry, noncommutative geometry, mathematical physics, etc.

Anonymous

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Anonymous Tue 18 Sep 2018 06:55:15 No.10011985 Report

Quoted By: >>10012133

>>10010281
>supporting our publishers
>supporting
>publishers
The whole industry ought to be destroyed desu. Nonprofit book publisher when?

Anonymous

Anonymous Tue 18 Sep 2018 07:13:38 No.10012015 Report

Quoted By: >>10012020

>>10009189
You might want to take a look at random matrix theory, there is hope that we might me able to tackle the Riemann Hypothesis using tools from RMT

Anonymous

Anonymous Tue 18 Sep 2018 07:15:28 No.10012020 Report

Quoted By:

>>10012015
I forgot to said this but look at the Hilber-Polya conjecture

Anonymous

Anonymous Tue 18 Sep 2018 09:00:35 No.10012127 Report

Quoted By:

>>10010565
That library is too big to be useful.
>Books on X subject plox!
>Here are 50 pdfs with just the title and author!
At the minimum I'd advice maintaining a second folder of "checked out" books and copying the PDFs you're currently reading into it. It will help keep that shit from becoming overwhelming. Though you're honestly better off looking for books as you need them and grabbing them off libgen.

Anonymous

Anonymous Tue 18 Sep 2018 09:02:16 No.10012133 Report

Quoted By:

>>10011985
There's also self-publishing setups like Lulu. Though aside from HoTT and Basic Analysis you won't find much good stuff on Lulu.

Anonymous

Anonymous Tue 18 Sep 2018 09:03:48 No.10012137 Report

Quoted By:

>>10009409
based
>>10009433
cringe

Anonymous

Anonymous Tue 18 Sep 2018 09:38:00 No.10012178 Report

Quoted By:

>>10011571
I'm about to start my PhD there actually, haven't started so no clue. Looks nice

Anonymous

Anonymous Tue 18 Sep 2018 09:51:25 No.10012189 Report

Quoted By:

>>10004325
Introduction to Mathematical Thinking on Coursera teaches the very basics.

Anonymous

Anonymous Tue 18 Sep 2018 11:19:54 No.10012257 Report

Quoted By:

>>10011852
Modular arithmetic.

Because carries propagate from right to left, the units (rightmost) digit of the output is only affected by the units digit of the input, the tens digit of the output by the units and tens digits of the inputs, etc. So any fixed number of rightmost digits will form a cycle. Multiplying by a number coprime to the modulus always forms a maximal-length cycle.

In base 10, any prime other than 2 or 5 is coprime to any power of 10, so the last digit will follow a cycle of length 10, the last two digits a cycle of length 100, etc.

Anonymous

Anonymous Tue 18 Sep 2018 11:47:09 No.10012302 Report

Quoted By: >>10012308 >>10012317 >>10012348

>>10009304
>>10009325
CS undergrad here. You idiots can't into OCR?

Anonymous

Anonymous Tue 18 Sep 2018 11:49:53 No.10012308 Report

Quoted By:

>>10012302
Even CS can't into OCR. I tutor a CS course and we had to manually sort 400+ signed anti-plagiarism pledges instead of just indexing them by OCR.

Anonymous

Anonymous Tue 18 Sep 2018 11:54:43 No.10012317 Report

Quoted By:

>>10012302
It actually has been but the pdf is still presented as a scanned image, I imagine because it would be impossible to recreate the formatting.

Anonymous

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Anonymous Tue 18 Sep 2018 12:07:53 No.10012348 Report

Quoted By:

>>10012302
>>>/g/

Anonymous

Anonymous Tue 18 Sep 2018 18:30:23 No.10012993 Report

Quoted By:

>>10012488
>>10012488
>>10012488

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