/sci/ - Science & Math

I once read this on /b/:
"The main cause of child molestation is sexy children".

I think it was intended to be a joke (or I hope so), but the guy had a point: have you seen high school girls lately ? They look like prostitutes. What can a penis do?

No But seriously, girls are developing early is only natural that men star feeling aroused early too, righ?

Why are smart girls hard to find? I mean, I would marry a girl who knows who is Feynman or Sagan ... Kinda /sci/ related I think

>sketch y=x^2
>sketch x=4
>2 solutions

>quadratic equation
>+-sqrt

http://www.wolframalpha.com/input/?i=x%5E2%3D2+soulution

>equations involving absolute values

hey, can anyone explain how one shows that a function is a bijection? the function in question is f(x,y)=(2x+y,x-y) , but i'm more interested in the general method

Can we have a science/mathjokes thread?
I'll start:

Q: Why do you rarely find mathematicians spending time at the beach?
A: Because they have sine and cosine to get a tan and don't need the sun!