Archived threads in /sci/ - Science & Math - 446. page

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What are they?

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I just realized something regarding gender differences in sexuality.

We all know that men objectify women. We see a nice body, or even a nice body PART, and we want to fuck it.

But women objectify men, too, right? WRONG. Let's look at what women find attractive in men.

There are only a few PHYSICAL traits that women are consistently drawn to: height, musculature, and to some extent, a "masculine face".

What NON PHYSICAL traits do women like? Fame, success, power, dominance, etc.

What do these traits have in common? They both demonstrate capability.

Being famous, influential, and rich means that you can enforce your will on others. Being tall and strong means you can...enforce your will on others. A "masculine face" is probably just a proxy that correlates with testosterone levels or something too.

So in short, men OBJECTIFY women, and women SUBJECTIFY men. The more of a "subject" a man is (the more capable he is of enforcing his will on the environment around him), the more attractive of a mate he is.

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http://www.math.caltech.edu/simon/biblio.html

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>equation isn't solvable by humans

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Does anybody have an even more updated version of pic related? Math reference sheet and the like thread, good for summer overview

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Is there anything wrong with it? It gets made fun of a lot, but it doesn't seem to actually be bad in theory. It's essentially just hyping up what humankind will already do in the future (if they don't JUST themselves to extinction) but sooner than reasonably expected.

Do you agree with crazy Kurzweilan timelines or think it'd take much longer?
If I understand it correctly, the purpose is to eliminate aging to allow civilization to think on the scope of longer timescales? In essence, if you have reason to worry about more than 80 years as an individual, you will take more effort in ecology/space colonization/longer term existential hazards for humanity.

And speaking of long time scales since I didn't get an answer in a previous thread: Do protons decay, or are we just trying to figure out how to make them decay to fit a Theory of Everything? I've only seen articles that say it either doesn't happen or happens 10^11 times further in the future than the universe is old.

Also do you guys think our current model for the creation and fate of the universe is as good as it'll get, or will we eventually return to an ageless universe theory?

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Prove that the reflection matrix:

[math]
S = \begin{bmatrix}
2x^{2} - 1 & 2xy\\
2xy & 2y^{2} - 1
\end{bmatrix} [/math] is of the form [math]\begin{bmatrix}
a & b \\
b & -a
\end{bmatrix} [/math] where [math]a^{2} + b^{2} = 1[/math]

Proof:

[eqn]a = -(-a) [/eqn][eqn]2x^2-1 = 1-2y^2 [/eqn][eqn]2x^2 - 2 = -2y^2 [/eqn][eqn]2(x^2 -1) = -2y^2 [/eqn][eqn]x^2 - 1 = -y^2 [/eqn][eqn]x^2 + y^2 = 1 \;\;\;\;\;\;\;\;\;\;\;\; [1][/eqn]

[eqn](2x^2 - 1)^2 + (2xy)^2 = 1 [/eqn][eqn]4x^4 - 4x^2 + 1 + 4x^2y^2 = 1 [/eqn][eqn]4x^2(x^2 - 1 + y^2) = 0 \;\;\;\;\;\;\;\;\;\;\;\; [2] [/eqn]

now plugin [1] into [2]:
[eqn]4x^2(1 - 1) = 0 [/eqn]

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How do I prove that x is this equation using snell law and trig?

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>tfw too intelligent for maths

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Guys im trying to figure out calculus so as an beginner level question I wanted to calculate the area of any circle with radius r.

I did this in two ways, one way worked, the other one didnt, and I have no idea why not.
Bascially I did the following in the first one: I split the circle into smaller circles, then I calculated all the Circumfrences of all dr's and summed them up. With that method I get the Integral over 2*Pi*r dr which of course solves to Pi*r^2.
This is A in the attached image.

In B I first split the circle into 4 quadrants, then I tried defining the relations of all the little rectangles that are dx * y, I noticed that y is variable, and a function of x, so I drew out what the function must be by using Theta, it turned out to be y(x) = sin(arccos(x/r)
Then I took the Integral of these y(x) * dx from x=0 to x=r, which is one quadrant of the circle. This evaluated to (Pi*r)/4, multiplying by 4 should give me the Area of all 4 Quadrants combined, so Pi*r.
This is as we know not correct, its supposed to be Pi*r^2, im just so confused to where exactly I am missing out on the second r, since the method itself doesnt look that flawed to me.

Many thanks in advance!

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not sure whether /sci/ has had a thread on this yet. viable renewable energy solution or LARP?

https://www.dropbox.com/sh/evukdbz3cqbesiv/AAAj24GREGfFfDB5xjVOyVcWa?dl=0&preview=energy.pdf

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I was watching the ISS Earth live stream and saw a strange cloud formation which looked like a nearly perfect circle. Is this a natural occurring cloud formation? Pic related

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Economicfag here!

Can we discuss a little about the implication of an inflation less than 1% in an open economy?

Extra Points: ... And what is the relation ship of the effects of an economy with that inflation in the productivity of the country? (open economy)

I know that exists a relationship between the inflation and unemployment, wich is somehow related with the productive funcion of a country. Also, that constant inflation lower that one in the long run says that the economy is stagnant... but why?

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What happens after the universe ends, and why??

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Is there any decent science themed shows?