/sci/ - Science & Math

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Anonymous Tue 12 Oct 06:54:20 2021 No.13742079 View Reply Original Report

Quoted By:

>I fucking love science!!

Anonymous

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Anonymous Tue 12 Oct 2021 06:57:25 No.13742087 Report

Quoted By: >>13742092

Anonymous

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Anonymous Tue 12 Oct 2021 06:59:27 No.13742092 Report

Quoted By:

>>13742087
OOOHHH, IS THAT A BLACK FEMALE LGBTP SCIENTIST ?
TAKE THAT BIGOTS.
SCIENCE ALWAYS WINS!

Anonymous

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Anonymous Tue 12 Oct 2021 07:01:37 No.13742098 Report

Quoted By: >>13742111

Anonymous

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Anonymous Tue 12 Oct 2021 07:06:21 No.13742111 Report

Quoted By:

>>13742098
>Not liking niggers means he must be from the red team. blue good, red bad, there are only 2 options

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Anonymous Tue 12 Oct 06:38:32 2021 No.13742059 View Reply Original Report

Quoted By:

Why do physicists have such stinky butthole?

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Anonymous Mon 11 Oct 12:36:54 2021 No.13739339 View Reply Original Report

Quoted By:

Hey, nerds! Imagine you have 2 event horizons moving in on each-other without spin with singularities going directly at each-other. Let's stop at the moment they get overlapped like in pic related. They are moving close to the speed of light (some parts of space even faster if I'm not mistaken). The question is: can you go from one horizon to the next (grey to grey). Can you enter the blue zone from either horizon? What would be the forces on you if you tried to enter the blue zone at the very top? (the narrowest part)

6 posts and 1 image omitted

Anonymous

Anonymous Tue 12 Oct 2021 00:27:19 No.13741203 Report

Quoted By: >>13742057

>>13740666
he types the whole thing out each time

Anonymous

Anonymous Tue 12 Oct 2021 06:34:51 No.13742053 Report

Quoted By:

>>13740553
you're barking at the wrong tree, pal

Anonymous

Anonymous Tue 12 Oct 2021 06:38:21 No.13742057 Report

Quoted By:

>>13741203
Unironically the best version of /sci/.

Anonymous

Anonymous Tue 12 Oct 2021 06:41:44 No.13742066 Report

Quoted By: >>13742096

i have a phd in physics, though not in this particular field, but I did study black holes and GR and the BH information paradox quite a lot during grad school.

my problem here is that all of the questions posed in this thread so far are too imprecise. my gut reaction is that it’s just undergrad-tier mouth flapping and that the there is no actual question here

however. if someone can formulate a well-posed question, i would be happy to respond to it.

Anonymous

Anonymous Tue 12 Oct 2021 07:01:19 No.13742096 Report

Quoted By:

>>13742066
>i'm an expert in loch ness monster: space edition
cringe

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Math Hep General

Anonymous Mon 11 Oct 21:05:56 2021 No.13740655 View Reply Original Report

Quoted By: >>13740800 >>13740829 >>13742038

any anons able to help a retard with equivalence relations and partitions. picrel are the questions. idk where to start for #1. i knw i have to prove the 3 axioms for equivalence, then prove Ai and A are either equivalent or disjoint, but how? what do i do with a,b e Ai?
post your questions and i'll try to help you out too
thanks, imaretard

Anonymous

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Anonymous Mon 11 Oct 2021 22:13:41 No.13740800 Report

Quoted By:

>>13740655
Since the { Ai } partition A, then by definition:
Union(Ai) = A (for i=1,n)
Intersect(Ai, Aj) = {} (for i != j).
Therefore, we can conclude that if a in A, then a in Ai for some Ai and only in Ai (and not some other Aj).

Well-defined: Trivial, since set membership is also well-defined.
a ~ a: Trivial, since a in A => a in Ai and if a in Ai, then a in Ai tautologically. Thus, a ~ a.
a ~ b => b ~ a: Also trivial since a ~ b => a, b in Ai for some Ai, so b, a are also in some Aj (in this case j = i).
a ~ b AND b ~ c => a ~ c: We know a, b in Ai and b, c in Aj. We want to show a, c in Ak. Note that since { Ai } partitions A, if b in Ai, then b cannot be in any other Aj for j != i. Thus, Aj = Ai.
Therefore, a, b in Ai and b, c in Ai trivially implies a, c in Ai (so Ak = Ai). Thus this property also holds.
--------
Also, keep in mind that (infinite) sets in modern mathematics are not well-defined and Cantor was a literal schizo. That is all.

Anonymous

Anonymous Mon 11 Oct 2021 22:28:23 No.13740829 Report

Quoted By:

>>13740655
It's always a good idea to write down "Want to show:" and write what it is EXACTLY that you want to show. Clear writing helps you see where to go.

WTS (1): ~ is an equivalence relation
WTS (2): A/~ = {A1, ..., An}

For the first one, to show that ~ is an equivalence relation, you have to show 3 things:
WTS (1.1): Reflexivity: a ~ a
WTS (1.2): Symmetry: a ~ b implies b ~ a
WTS (1.3): Transitivity: a ~ b and b ~ c implies a ~ c

Now rewrite these in terms of the relation:
WTS (1.1): a and a (redundant) are in Ai for some i
WTS (1.2): "a and b in Ai for some i" implies "b and a in Aj for some j"
WTS (1.3): "a and b in Ai for some i" and "b and c in Aj for some j" implies "a and c in Ak for some k"

Try tackling them like this, and try rewriting WTS (2). And ignore the last sentence from the first post schizo.

Anonymous

Anonymous Tue 12 Oct 2021 06:25:03 No.13742038 Report

Quoted By:

>>13740655
From a bit of a broader perspective, think of it like this: an equivalence relation on a set is just a way of partitioning it. So if you already have A partitioned into {A_1,...,A_n}, then there is a natural, unique, corresponding equivalence relation on A for which the equivalence classes are the partition you have: namely, the one given in the statement of the problem.

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Anonymous Tue 12 Oct 01:41:12 2021 No.13741411 View Reply Original Report

Quoted By: >>13741690 >>13741940 >>13741988

So what's the universe, /sci/? What is reality? Why is relativity real? Does science prove that ontological physicalism is true?

1 post omitted

Anonymous

Anonymous Tue 12 Oct 2021 03:36:48 No.13741690 Report

Quoted By: >>13741718

>>13741411
>Does science prove that ontological physicalism is true
If I proved it for you, you'll never know if that was really objective and not in your subjective awareness only.
Its safe, permanently. Embrace idealism.

Anonymous

Anonymous Tue 12 Oct 2021 03:49:26 No.13741718 Report

Quoted By:

>>13741690
Physicalism and Idealism are not mutually exclusive.

Anonymous

Anonymous Tue 12 Oct 2021 05:42:56 No.13741940 Report

Quoted By:

>>13741411
>Does science prove that ontological physicalism is true?
Science doesn't use such silly terminology

Anonymous

Anonymous Tue 12 Oct 2021 06:02:35 No.13741988 Report

Quoted By: >>13742005

>>13741411
Science doesn't prove anything is true. A lot of idiots act like it does, especially the atheists who claim to acknowledge this fact, but it doesn't. Only mathematics proves certain things are true (the difference of two squares is the product of the difference and sum of their lengths)

Anonymous

Anonymous Tue 12 Oct 2021 06:10:12 No.13742005 Report

Quoted By:

>>13741988
>Only mathematics proves certain things are true
I hate this stupid opinion. Even the validity of mathematics ultimately rests on your belief in your own sanity, so mathematics too does not truly "prove" anything.

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Anonymous Tue 12 Oct 01:37:14 2021 No.13741401 View Reply Original Report

Quoted By: >>13741957

Whats the highest number you can count to

6 posts omitted

Anonymous

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Anonymous Tue 12 Oct 2021 05:48:56 No.13741957 Report

Quoted By: >>13741972

>>13741401
N+1
where N=the highest number of everyone else in this thread

Anonymous

Anonymous Tue 12 Oct 2021 05:56:44 No.13741972 Report

Quoted By: >>13741987

>>13741957
now you have to count until the end of time

Anonymous

Anonymous Tue 12 Oct 2021 06:02:31 No.13741987 Report

Quoted By: >>13741995

>>13741972
Yeah but I win the thread

Anonymous

Anonymous Tue 12 Oct 2021 06:05:20 No.13741995 Report

Quoted By: >>13742003

>>13741987
not if i do it too

Anonymous

Anonymous Tue 12 Oct 2021 06:09:41 No.13742003 Report

Quoted By:

>>13741995
kek and based

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Less than 1% of the world population can probably solve integrals

Anonymous Sun 10 Oct 20:34:10 2021 No.13737469 View Reply Original Report

Quoted By:

And yet you expect us to go to space and beyond.
>INB4: Not scientific

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Anonymous

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Anonymous Mon 11 Oct 2021 16:37:18 No.13739915 Report

Quoted By: >>13740164

>>13739671
>the indefinite integral of x is x^2
oh no! You should study moar

Anonymous

Anonymous Mon 11 Oct 2021 17:28:09 No.13740078 Report

Quoted By:

What the fuck in an integral?
What the fuck is space?

Anonymous

Anonymous Mon 11 Oct 2021 17:50:15 No.13740145 Report

Quoted By: >>13741983

>>13738340
Probably because it is entirely useless in 90 percent of fields.
It's hilarious how lower math cucks such as op feel superior for knowing what basically amounts to useless information

Anonymous

Anonymous Mon 11 Oct 2021 17:55:40 No.13740164 Report

Quoted By:

>>13739915
fuck i forgot the two behind the x

Anonymous

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Anonymous Tue 12 Oct 2021 06:01:05 No.13741983 Report

Quoted By:

>>13740145
Stay mad arts major. Math is a good indicator on how long you've been studying and the quality of it. You just don't forget how to solve integrals

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Anonymous Tue 12 Oct 04:28:05 2021 No.13741809 View Reply Original Report

Quoted By: >>13741876

Why do we like the smell of our own farts?

3 posts omitted

Anonymous

Anonymous Tue 12 Oct 2021 04:33:46 No.13741826 Report

Quoted By: >>13741832

>>13741813
this
it's only repulsive when it's someone else's
I don't think you actually "enjoy" the smell but you may think you do because it isn't repulsing you when you think it should be

Anonymous

Anonymous Tue 12 Oct 2021 04:38:15 No.13741832 Report

Quoted By: >>13741980

>>13741826
No, I actually do
When I'm alone I sometimes fart on my hand and smell it. Or fart under the blanket and breath it in..
I still find any other person's farts utterly repulsive so its not a weird fetish thing or something

Anonymous

Anonymous Tue 12 Oct 2021 04:41:21 No.13741837 Report

Quoted By:

>>13741813
>We use our shit and pee to mark our territory
This. It's why I like when my wife shits and pees all over me. Kinda hot desu.

Anonymous

Anonymous Tue 12 Oct 2021 05:01:37 No.13741876 Report

Quoted By:

>>13741809
ur on ur own there bud

Anonymous

Anonymous Tue 12 Oct 2021 05:59:33 No.13741980 Report

Quoted By:

>>13741832
you only think you do because you don't mind it but your brain thinks you should.
you wouldn't use fart scented deodorant or fart air freshener in your room and you wouldn't eat food that smelt of fart

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Anonymous Mon 11 Oct 17:44:06 2021 No.13740129 View Reply Original Report

Quoted By: >>13741178 >>13741966

>Giga...bier

Musk has run out of stuff to make.

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Anonymous

Anonymous Mon 11 Oct 2021 18:35:16 No.13740259 Report

Quoted By:

>>13740140
kitchenmaid stand mixers built up to 1960 specs would be a big improvement over modern technology too

Anonymous

Anonymous Mon 11 Oct 2021 18:36:35 No.13740260 Report

Quoted By:

Not gonna drink it as long as it looks like a perfume bottle or pretentious vodka bottle and there's no bottle cap to collect.

Anonymous

Anonymous Mon 11 Oct 2021 20:47:35 No.13740610 Report

Quoted By:

>>13740140
go away Alec

Anonymous

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Anonymous Tue 12 Oct 2021 00:17:53 No.13741178 Report

Quoted By:

>>13740129
>Musk has run out of stuff to make.
That's assuming this criminal fraud made anything to begin with.
>>13740253
>Jump to the 30 minute mark.
No. I don't listen to conman.

Anonymous

Anonymous Tue 12 Oct 2021 05:53:21 No.13741966 Report

Quoted By:

>>13740129
No he is just cashing out on all the folks who worship him, afterall he is too a business man

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Anonymous Tue 12 Oct 01:17:33 2021 No.13741341 View Reply Original Report

Quoted By: >>13741612 >>13741904 >>13741910

Brainlet here,Can we deduce that two rings R1 and R2 are isomorphic if their polynomial ring are isomorphic?

that is given two rings R1 and R2 (with or without identity: it's not specified). If R1[x] is isomorphic to R2[y]
(No such requirement that the isomorphism sends the constant terms to constant terms),

can we deduce that R1?R2?

Anonymous

Anonymous Tue 12 Oct 2021 03:00:14 No.13741612 Report

Quoted By:

>>13741341
Some thoughts
Composing the two isomorphisms we get an automorphism of R1[x]
True or false: If R1 is an integral domain, then any automorphism must send x to a linear polynomial

Anonymous

Anonymous Tue 12 Oct 2021 05:22:04 No.13741904 Report

Quoted By: >>13741910

>>13741341
Obviously yes because any ring R can be embedded within its polynomial ring R[x]

Anonymous

Anonymous Tue 12 Oct 2021 05:27:45 No.13741910 Report

Quoted By:

>>13741341
No we cannot
See: https://math.stackexchange.com/questions/387345/isomorphism-of-polynomial-rings-implying-isomorphism-of-the-coefficient-rings

>>13741904
You didn't understand the question

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Less than 1% of the world population can probably solve integrals