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MATH is a wonderful thing...

MATH is a really cool thing...

So get off your act lets do some MATH...

MATH, MATH, MATH, MATH, MATH...

http://www.youtube.com/watch?v=aa8U0nL-KXg


6h
awarded  Enlightened
7h
awarded  Nice Answer
Jan
23
reviewed No Action Needed Embeddings are precisely proper injective immersions.
Jan
16
reviewed No Action Needed $I+J=R$ and $r+s=1, r\in I,s\in J$ then $sx+ry\in IJ\Rightarrow x\in I$ and $y\in J$
Jan
16
answered Proof that $f:\mathbb R\to[-1,1], f(x)=\cos x$ is surjective
Jan
14
comment What significant differences are there between a Riemannian manifold and a pseudo-Riemannian manifold?
The author of the book that you mentioned is an active participant of math.stackexchange: math.stackexchange.com/users/1421/jack-lee Possibly he can answer your question when he reads your question.
Jan
14
comment Index Notation Divergence of f grad g
Yes, that's almost correct. But you miss $f$ in the second term on the right hand side. That is, the second term should be $f\partial_k\partial_kg$, which is equal to $f\Delta g$.
Jan
14
answered Index Notation Divergence of f grad g
Jan
10
comment Baby Rudin: Chapter 1, Problem 6{d}. How to complete this proof?
This does not really answer the question. If you have a different question, you can ask it by clicking Ask Question. You can also add a bounty to draw more attention to this question.
Jan
10
reviewed Approve Evaluate $\lim_{x \to 4}\frac{(2x)^{1/3} - 2}{\sqrt{x} - 2}$ without L'Hospital rule
Jan
9
reviewed Looks OK What is difference between cycle, path and circuit in Graph Theory
Jan
9
reviewed Looks OK Quasicomponents and components in compact Hausdorff space
Jan
9
comment Expected value of $X$ given $X > Y$
If you have a new question, please ask it by clicking the Ask Question button. Include a link to this question if it helps provide context.
Jan
8
reviewed Approve Continuous function with differentiation
Jan
7
revised prove $f$ is a constant
edited body; edited tags
Jan
7
answered prove $f$ is a constant
Jan
6
revised Separation of an integral
edited tags
Jan
2
answered Show $D^2=0$ iff $D=e^{-f}de^{f}$ for some function $f$ , where $D\omega := d\omega+\alpha \wedge \omega $
Jan
1
reviewed Close What is the difference between helix and spiral?
Jan
1
reviewed Close Pointwise limit of the sequence $\{f_n\}$