Archived threads in /sci/ - Science & Math - 670. page

>>8795969
Nah, too much background noise. Your brain produces less EM radiation than just about any electronic device, and of course the signal would die down like 1/r^2. It would be like trying to pick up a radio station from across the country.

>>8796131
>what is a Fourier series.

yea i suppose its possible in the long run, if you find a nice deeplearning algorithm and manage to get allot of training data.

>>8796131
>>8796476
I'm also referring to a moving target as well, not a specific spot you would be at during the day. A lot of people believe in this shit.

That is the part where i draw a blank, unless everyone has a unique brain signature or something.

>>8795506
A thread died for this shitpost.

>>8795518
It was probably a worse shitpost.

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>>8795506
no it is not. cut a torus to make more multiple tori.
there is a distinct torus topology that will give you a perfect sphere on the surface.

https://www.youtube.com/watch?v=3_VydFQmtZ8

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sheaf is a functor from the open sets of a topological space to some other category

varieties are just zero sets of polynomials

don't start with hartshorne, it's not a good intro, read EGA insted

>>8795429
http://4chan-science.wikia.com/wiki/Mathematics#Algebraic_Geometry

>>8795429
A sheaf on a topological space, is something that assigns to each open subset of the space a set of "sections".

Usually the sets have addition structure, like a group or ring structure. And sometimes these sections are types of functions.

The sections must obey a gluing condition. So if you take a cover of some open set, the any section over that set can be uniquely constructed from sections over the elements of the cover.


ex.

Consider R^n. Let U denote an open subset

The assignment U --> C^k(U) is a sheaf.

Where C^k is k-times cont. diff functions.

ex.

Consider C^n. Let U denote an open subset.

The assignment U --> O(U) is a sheaf.

Where O is holomorphic functions.

>>8795163
how so?

either way it's a classification that has no benefit of being made. they are just as much the same species right?

are you basing this purely on skin color/facial features? then why arent italians a different sub species than northern euros?

>>8795163
Maybe a hundred years ago, now the world has become so small and there is so much movement of people that geographic separation has become meaningless. You can only really sustain the separation of gene pools by creating artificial reservations and withholding outside technology, politics and culture from the 'protected' population.

>>8795172
I read somewhere that earwax in east Asians and native Americans is chemically different
Africans clearly have more than just skin color separating them.

>>8795177
I wouldn't be surprised if populations that aren't so different become become less over time, but truly divergent groups such as Aboriginals just don't reproduce with other ethnicities enough.

And why? Because if we do it to other species why should we be any exception.

He was too smart for his race so his body deteriorated.

>he is the sole reason people are starving in india

The fact that he was fat is not widely known is because he himself is not really a widely known figure. Outside the world of leftist internet pop-science nobody cares about a random indian guy who happened to be good in maths but wasn't exceptional in any way that would justify the adoration he has received.

>>8800251
https://en.wikipedia.org/wiki/Women_in_Buddhism

Nirvana sutra, volume 9, chapter Bodhisattva, Buddha stated that women can't be satisfied with their lust - even unlimited men having sex with a women cannot make her content.

Eelco ten Have, I have question for you too. What do you think happens with the Englightenment of a person who suffers a stroke or Creutzfeldt-Jakob disease?

And we have an example of a Vietnamese monk Thich Nhat Hanh who suffered a severe hemorrhagic stroke
(in my opinion he wasn't lucky enough like Mahasi Sayadaw and he survived this dismal event), what we know is that he suffers a complete aphasia.

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>>8800251
Are you asking for evidence because you haven't fucked a woman to that point yet?

Or do you have some kind of moderately funny joke coming up?
>>8800252
maybe you shouldn't cite a religion on a science & math board.

They're ok for philosophical reasons or if you cant think for yourself.
But they dont really belong in anything fact related. Unless it's about themselves, which we have /his/ and /x/ for.

>>8800260
>Are you asking for evidence because you haven't fucked a woman to that point yet?
>bitch says she's cumming but didn't
Apparently happens all the time.

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>>8799820
get out of /sci/

>>8799831
You'll never get rid of me

No. Reminder that psychology is not a scientific field and it's full of bullshit like this.

>>8799564
Dude, what textbook is that from?

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>>8799555

Would be nice, don't think they can just retrofit it in without some large changes though

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>>8799461
True. I think having cams in the cargo area is doable right away. Seeing the stuff get put into orbit is pretty cool.

>>8799535
military is not going to allow a camera shot of their payloads

>>8799439
I think it's like the guys who memorize 50000 digits of pi, clever techniques.

For most of history it has been tricks but occationally you get people who have a very clear "gift" which today we can find through brain scans to be a unification of brain activity or a form of synesthesia, both being automatic processing.

-Sorry for the run-on grammar is one of my weaknesses.

>>8799439
Ever wonder why people spend their entire lives trying to run the fastest when we have bicycles? Probably just want to make a living for themselves.

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>>8799431
Step one: Fill space with water
Step two: Use muscles to displace water
It's that simple

>>8799467
Back to /b/

Answer.

>>8799399
Sure. Few ways to look at it. That equation is wrong by the way. The first term on the left has m!/m!. Probably the easiest is to use binomials or pascals triangle. However you could just simplify both sides instead.

[eqn] (x+y)^n = \sum_{k=0}^n \frac{n!}{k!(n-k)!}x^k y^(n-k) [/eqn]
Multiply both sides by [math] x+y [/math] to get
[eqn] (x+y)^(n+1) = \sum_{k=0}^{n+1} \Big(\frac{n!}{k! (n-k)!}+\frac{n!}{(k-1)! (n-k+1)!}\Big)x^k y^(n-k+1) [/eqn]

Equation equal coefficients in this equation with the coefficients in the first equation after replacing [math] n [/math] by [math] n+1 [/math]

Paraphrasing a VERY smart person.
"No one understands why math works. They just get used to it and take that for understanding"

>>8799432
Obviously I accidentally powered just the parenthese and not the whole term in the [math] n-k, n-k+1, \text{and} n+1 [/math]

There's another clever way to look at it using combinatorics.

Suppose you have n+1 objects and want to know how many ways you can pick out k objects.

First set one object aside. Decide you won't use that object, and calculate how many ways you can pick k objects out of n objects. Now also decide you WILL use that object. Calculate how many ways you can pick k-1 objects out of n objects.

Obviously if you add these you'll just get how many ways you can pick out k objects out of n+1 objects.

tada, two ways to prove the same thing.

>>8799358
>So when do humans start space colonization?
see
>>8794047

>What are the chances of alien life?

High, but we will never see them except for some extremophiles in our own solar system.

>Do you think they are advanced as us or they are in a different level?

A little of everything possible I'm sure, but not much more advanced since science doesn't have too many tricks left to discover. It is almost all engineering at this point.

space colonization is largely a meme
the most we'll have for foreseeable future or maybe ever is a small research station on mars

>>8799543
Not so much a meme. People tend to want to colonize the wrong places. Like Mars for instance.

>>8799137

Why is the blue skin a down side? Blue skin is awesome, your whole life will be like an animu. Take double the dose and keep us posted with your progress!

>>8799137
i'm surprised this stuff doesn't have very negative side effects
seems less harmful than being an alcoholic

go get silverpilled op

>>8799137
There is no health benefit to be had from taking silver pills. Unless you count blue skin and an empty wallet as health benefits.

>>8799022
The healthcare system.

Niggers.

Zinc fingers. And some instances of TALENs.