/sci/ - Science & Math

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Anonymous Wed 30 Mar 23:09:11 2022 No.14350321 View Reply Original Report

Quoted By: >>14351011 >>14351656 >>14351677

How close can you get to it before your body and ship begin to disintegrate?

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Anonymous Thu 31 Mar 04:22:01 2022 No.14350944 View Reply Original Report

Quoted By: >>14350961 >>14351063 >>14351201 >>14351604

When will we be able to see what's happening on other planets?
I wanna see aliens fuck

Anonymous

Anonymous Thu 31 Mar 2022 04:31:35 No.14350961 Report

Quoted By:

>>14350944
Anon why do you think radios exist? Besides it’s unlikely we’ll ever be able to see anything past a set number of light years away as the frequency of a light wave dies out with displacement away due to the Doppler effect as waves get weaker

You could think of this as a trig function like
Idk
a*sin(1/(b+(1/some constant*x(x))) where x >= 0
And x represents the displacement from the source and y represents the point at which the wave undergoes a repeat while the space in between the waves represent the periods or more specifically the strength of the signal

Anonymous

Anonymous Thu 31 Mar 2022 05:39:31 No.14351063 Report

Quoted By:

>>14350944
>I wanna see aliens fuck
Lol
Imagine there's some alien just like you on a different planet, watching earth through some supertelescope, and he's just now receiving footage of how you were made.

Anonymous

Anonymous Thu 31 Mar 2022 07:10:30 No.14351201 Report

Quoted By:

>>14350944
imagine aliens watching us on a human version of animal planet

Anonymous

Anonymous Thu 31 Mar 2022 12:19:15 No.14351604 Report

Quoted By:

>>14350944
you'd need a telescope about 1 light year across. so its not happeing in your lifetime, coomer.

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Anonymous Wed 30 Mar 05:35:44 2022 No.14348365 View Reply Last 50 Original Report

Quoted By: >>14351503

What exactly is a "field?"

70 posts and 3 images omitted

Anonymous

Anonymous Thu 31 Mar 2022 11:17:37 No.14351495 Report

Quoted By: >>14351589

>>14350503
You need a government to suppress creativity, and even then people would still create in secret, or even openly if they dare risk death. The right to create comes from God and can never be taken away through mortal means, like all other negative rights.

Anonymous

Anonymous Thu 31 Mar 2022 11:23:21 No.14351503 Report

Quoted By:

>>14348365
A torus

Anonymous

Anonymous Thu 31 Mar 2022 12:05:49 No.14351584 Report

Quoted By:

>>14351481
>Are you ESL or just retarded? You can. You simply won't.
Ok, I "shouldn't" or I "mustn't", are you satisified now professor? May I take your leave now?

Anonymous

Anonymous Thu 31 Mar 2022 12:08:04 No.14351589 Report

Quoted By:

>>14351495
>The right to create comes from God and can never be taken away through mortal means, like all other negative rights.
Wasting seed is also a negative right, but it is irrelevant since what matter is the Torah and what is says (and by extensions what the sages say), and the Torah says wasting seed is the one of the worst sins in the Torah.

Anonymous

Anonymous Thu 31 Mar 2022 12:12:22 No.14351596 Report

Quoted By:

an area

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/mg/ Mathematics générales, Grothendieck edition

Anonymous Thu 24 Mar 02:03:19 2022 No.14330096 View Reply Last 50 Original Report

Quoted By:

For discussion of math and maths. Suggested topics:
1. EGA
2. EFA
3. CGA
4. VGA
5. Tandy graphics
Perv thread >>14303588

316 posts and 57 images omitted

Anonymous

Anonymous Wed 30 Mar 2022 23:59:12 No.14350413 Report

Quoted By: >>14350472

>>14350190
when i was a kid, i associated every digit from 0 to 9 in my mind with a certain color. but it didn't last long. and i am not even sure if the colors remained the same or i just saw random colors. i didn't know there was a term for that.

Anonymous

Anonymous Thu 31 Mar 2022 00:24:14 No.14350472 Report

Quoted By: >>14350606

>>14350413
It's the same for me, but also with letters and days of the week. (btw, your associations CAN change as you grow up)
I had a classmate look at my notes and she was shocked to see everything written in a blue pen.
But for me, it's in different colors. When I write "a and b", they're white and red. "f and g" are blue and purple. s is yellow, t is green. x is a very dark brown, y is green, and z is black. My notes are already colored in my head.

If you're interested in knowing a bit more about Synesthesia, look up a book called "Wednesday is Indigo Blue". There's WAY more types of synesthesia, like with sounds and tastes. And 1 in every 23 people has it.

Anonymous

Anonymous Thu 31 Mar 2022 01:34:13 No.14350606 Report

Quoted By: >>14350681

>>14350472
That's interesting. what if you do write in multiple colors? You would still see your "internal colors" one per letter?
>My notes are already colored in my head.
I'd imagine it would be quite annoying for me to read a text with every letter individually colored (as opposed to an entire word or a sentence).

>Wednesday is Indigo Blue
Thanks. Found it on libgen

Anonymous

Anonymous Thu 31 Mar 2022 02:07:22 No.14350681 Report

Quoted By:

>>14350606
>what if you do write in multiple colors? You would still see your "internal colors" one per letter?
Yeah.

It's not strictly one color per letter. The examples I gave were for when I was using these letters individually like you'd normally do in math.
A letter's color can dominate the word it's in, for example, the word "real" (as in real analysis) is dominated by the red r, even though e is green, a is white, and l is yellow. Another side of it is that vowels can turn transparent in a word (a common thing), so the redness of the r stands out more.

Also, when I say I "see" these colors, I'm not seeing them on the paper with my eyes. It's like if I said "elephant" and an image gets conjured up in your head. So you're "seeing" the elephant, even though it's not on your screen.

So it's not annoying for me to have letters/words in color, because words get dominated, and I'm not actually seeing these with my eyes.

Anonymous

Anonymous Thu 31 Mar 2022 10:21:50 No.14351429 Report

Quoted By:

>>14339362
interesting because as a kid, and until this day, I've always imagined 6 and 8 to be male and everything else is female, including 0

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it just occurred to me that i am very stupid

Anonymous Wed 30 Mar 07:52:14 2022 No.14348545 View Reply Original Report

Quoted By: >>14349759

wut do?

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Anonymous

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Anonymous Wed 30 Mar 2022 18:40:26 No.14349739 Report

Quoted By:

>>14348807

Anonymous

Anonymous Wed 30 Mar 2022 18:45:00 No.14349759 Report

Quoted By: >>14351081

>>14348545
By knowing you're stupid you can thusly work towards making yourself smart.

Anonymous

Anonymous Thu 31 Mar 2022 05:47:29 No.14351081 Report

Quoted By: >>14351404

>>14349759
I don't think that's how it works fren

Anonymous

Anonymous Thu 31 Mar 2022 08:47:11 No.14351324 Report

Quoted By:

>>14348882
you will never be fully vaccinated

Anonymous

Anonymous Thu 31 Mar 2022 09:57:42 No.14351404 Report

Quoted By:

>>14351081
Thats exactly how it works, recognize a stupid thought pattern and then do something to stop it.

Bam, you just got smarter.

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/fg/- Finitist general

Anonymous Fri 25 Mar 14:46:54 2022 No.14335050 View Reply Last 50 Original Report

Quoted By:

ITT we discuss finitism, real numbers, platonism and schizophrenia in contemporary mathematics (to quote E. Bishop).

106 posts and 5 images omitted

Anonymous

Anonymous Wed 30 Mar 2022 11:17:45 No.14348783 Report

Quoted By:

bump

Anonymous

Anonymous Wed 30 Mar 2022 11:28:20 No.14348801 Report

Quoted By:

>>14346752
Ordinals with the property
$\omega^{\epsilon} = \epsilon$

Anonymous

Anonymous Wed 30 Mar 2022 15:06:40 No.14349237 Report

Quoted By: >>14349895

>>14347683
>If you're a programmer you might be more interested in weak linear logics like EAL (elementary affine logic) and set theories based on them
Why are they interesting?

Anonymous

Anonymous Wed 30 Mar 2022 19:34:10 No.14349895 Report

Quoted By:

>>14349237
They directly limit computational power by limiting and controlling duplication of premises (data) and, in more limited linear logics like EAL, how complex a recursion may be performed.

Normal linear logic has the same expressivity and strength as constructive and classical logic, but it keeps (some of) the advantages of controlling data duplication. In that way, it has a similar relationship to them, as constructive logic has wrt classical.
If constructive logic demystifies and gains control of what LEM does in classical logic, then linear logic does the same to constructive logic, and locks all the "infinitistic" stuff derived from logical contraction behind two logical modalities, making the infinitistic assumptions explicit and manipulatable.

Limited linear logics like EAL, limit more explicitly the complexity class of the functions they can express, by controlling not only the duplication of data, but also by limiting the origin of the data upon which recursion may occur. This is done by having recursively generated data be locked behind a logical modality, out of which they cannot get out. It's a very ultrafinitistic idea.
They probably could be extended to have the same expressive power as normal linear logic by locking the extra power behind yet another modality, but as far as I know that has not been done.

As you may or should know, all of the above cannot be Turing-complete (although it can be safely locked behind a monad, like IO in haskell), as Turing-completeness usually entails that the corresponding logical systems derives a contradiction.
What's also interesting is that linear logic is also inconsistency-resistant (paraconsistent): it lacks explosion, so only truly "explosive contradictions", contradictions that entail everything by their nature, are explosive. But that's not really related to finitism, although it may be interesting for programmers.

Anonymous

Anonymous Thu 31 Mar 2022 09:47:04 No.14351389 Report

Quoted By:

Bump

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Anonymous Thu 31 Mar 09:35:42 2022 No.14351376 View Reply Original Report

Quoted By:

Pluralize and disintegrate instead

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Anonymous Wed 30 Mar 22:47:30 2022 No.14350278 View Reply Original Report

Quoted By: >>14350826 >>14351364

>Calculates by time steps
>Introduces errors
>Chaotic outcomes differing from reality
Why can't you take the method of solving by time steps and take the limit as those time steps go to zero, producing a simulation that doesn't diverge?

Anonymous

Anonymous Thu 31 Mar 2022 03:01:49 No.14350819 Report

Quoted By:

You can probably find a sequence of closed rational intervals that contain and converge to the right answer by using successively better approximations. You'll need to do some work on figuring out the error bounds of your method, and showing they actually converge. If you're asking literally whether you can just "take the limit," well, you can't compute the limit of a sequence just from numbers in the sequence.

Anonymous

Anonymous Thu 31 Mar 2022 03:07:49 No.14350826 Report

Quoted By: >>14351336

>>14350278
you discretize calculus equations to map them to a digital computer, dumbass.

Anonymous

Anonymous Thu 31 Mar 2022 08:56:48 No.14351336 Report

Quoted By:

>>14350826
>What is lambda calculus?

Anonymous

Anonymous Thu 31 Mar 2022 09:24:30 No.14351364 Report

Quoted By:

>>14350278
>Why can't you take the method of solving by time steps and take the limit as those time steps go to zero, producing a simulation that doesn't diverge?
Because instantaneous velocity is perpendicular to the position vector relative to the center of rotation, but its position after dt is not along the velocity vector, it's circular. It's the same reason why you can't compute pi by dividing a circle in to infinitely many line segments.

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Anonymous Thu 31 Mar 03:29:57 2022 No.14350855 View Reply Original Report

Quoted By: >>14351042 >>14351089 >>14351337

>I'm 25 and I am still in the 3rd year of my engineering program with a 2.6 gpa

everyday i want to die. i think of my 17 year old self and how disappointed he would be in me. im still trucking on. i want to finish. but i think a MSc. is completely out of reach for me. it sucks.

5 posts omitted

Anonymous

Anonymous Thu 31 Mar 2022 05:11:53 No.14351018 Report

Quoted By: >>14351023

>>14350905
You don't know that, you stupid lying asshole.

Anonymous

Anonymous Thu 31 Mar 2022 05:16:24 No.14351023 Report

Quoted By:

>>14351018
dont get mad at me, guy, im just trying to use the hope of a happy future to dangle a carrot in front of your face. only you can decide when things need to change.

Anonymous

Anonymous Thu 31 Mar 2022 05:28:09 No.14351042 Report

Quoted By:

>>14350855
kek do they let you graduate with anything below a 3.0? You've got plenty of time to raise your GPA if you start now and get perfect marks. focus on projects more than anything. grad school is all about finding professors working on the kind of shit you want to work on. all you need is a decent enough personality that just one of them would accept taking you on. also, you can always go to a less competitive school in the future or switch to an adjacent field if you're too worried. just graduate, get a job, and figure out shit later

Anonymous

Anonymous Thu 31 Mar 2022 05:54:40 No.14351089 Report

Quoted By:

>>14350855
MS is still attainable even at T15 schools.

Let's assume you've completed 2.5/4 years worth of total coursework, that's 62.5%. That means for the other 1.5/4 years worth of course work you only need to make an average GPA of 3.66 to reach a 3.0 GPA. That is totally doable. Presumably as well you will meet enough professors whose classes you get an A in that will write you recs. Stop feeling sorry for yourself and take control of your life.

Anonymous

Anonymous Thu 31 Mar 2022 08:57:06 No.14351337 Report

Quoted By:

>>14350855
Finish it, go to law school, and become a patent attorney making 6 figures to start.

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Anonymous Wed 30 Mar 18:55:57 2022 No.14349788 View Reply Original Report

Quoted By: >>14349997 >>14350018

Is mass a fundamental property?

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/mg/ Mathematics générales, Grothendieck edition

it just occurred to me that i am very stupid

/fg/- Finitist general