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A mathematician, a programmer, etc. etc.


Aug
6
revised Cohomology ring of $U(n)$
Improved TeX
Aug
6
suggested suggested edit on Cohomology ring of $U(n)$
Aug
6
comment Closed form for this continued fraction
Rigorously speaking, $f(x)$ doesn't converge when $x\leq0$. If I recall correctly, this is by Worpitzky's theorem...I would be rather excited if I am wrong, though, and certainly do not rule it out!
Aug
5
comment Closed form for this continued fraction
I think he means "closed-form expression" the continued fraction...I'm guessing/hoping-since-I-already-answered ;p...
Aug
5
answered Closed form for this continued fraction
Aug
4
comment Name for this Sum
Well, it's not Euler's constant -_-' ...I think this question is too general, since we don't know anything specific about the $a_{n}$ coefficients or the sequence of products $b_{n}=\prod^{n}_{k=0}a_{k}$...
Aug
3
revised Optimize database indexes, the sequel
Improved grammar
Aug
3
suggested suggested edit on Optimize database indexes, the sequel
Aug
3
revised Optimize database indexes, the sequel
Improved formatting
Aug
3
suggested suggested edit on Optimize database indexes, the sequel
Aug
3
comment Learning math: still paper and pen
When you write with a pen/pencil on paper, your brain is actually registering the words --- whereas typing registers the letters. Consequently, the overall notes written by hand (in any subject) "sticks" with you longer and better than those just typed up. Ideally, you'd write by hand on paper first, then type them up in LaTeX taking into account corrections, citations, more interesting examples, etc. etc. etc.
Aug
2
comment How to solve $f\frac{\partial^2f}{\partial x\partial y} = \frac{\partial f}{\partial x}\frac{\partial f}{\partial y}$
Perhaps if you change coordinates to $z=x+\mathrm{i}y$ and $\bar{z}=x-\mathrm{i}y$, you get something along the lines of Laplace's equation. That should be a good first step...
Jul
25
revised When are $3$ vectors associative in triple cross products?
Improved the TeX formatting
Jul
25
suggested suggested edit on When are $3$ vectors associative in triple cross products?
Jul
20
comment is there a notion of graded Zariski tangent space?
There is a Zariski tangent space defined in this eprint, at the end of section 2.2 (on the top of page 4) is extended to a Zariski tangent superspace for a particular example therein.
Jul
11
comment Approximate solution for an ODE
Perhaps you should use some words...
Jun
12
comment Approximate solution for an ODE
Why not just make the approximation that $\pm1+\exp(l^{2})\approx\exp(l^{2})$ and $\pm l^{2}+\exp(l^{2})\approx\exp(l^{2})$?
May
18
awarded  Yearling
May
9
awarded  Caucus
Dec
25
revised A relationship between matrices, bernoulli polynomials, and binomial coefficients
added 1217 characters in body