Proofs wiki (good link)

[BrNathan]

I would like to recommend a website I found out two weeks ago. It is a wiki about physics and mathematical proofs: Proofs Wiki.

What do you guys think about it?

 

[Ishuda]

I would like to recommend a website I found out two weeks ago. It is a wiki about physics and mathematical proofs: Proofs Wiki.

What do you guys think about it?

Looks like it could be a good site. However one should make sure they don't get caught in a circular argument. I had a text book one time which proved that
$\displaystyle lim_{x\to0}\frac{sin(x)}{x} = 1$
by using the derivative of sin(x). Then, somewhere down the road proved
$\displaystyle \frac{d sin(x)}{dx} = cos(x)$
by using sin(h)/h went to 1 as h goes to zero. Talk about a chicken and egg problem