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seen May 14 at 13:47
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A mathematician, a programmer, etc. etc.


Jul
6
revised Equation question at interview
TeX-ed it up
Jul
6
suggested suggested edit on Equation question at interview
Jul
6
comment Derivative of Multi Variable Equation for Diablo 3 Damage Equation
+1 for the partial derivatives, And the extrema will be when these guys vanish, which is boring :'(
Jul
5
revised How to find closed form expression for a power series.
Cleaned up expression for $f(x)$, corrected typo for Ei(x)
Jul
5
answered How to find closed form expression for a power series.
Jul
5
suggested suggested edit on How to find closed form expression for a power series.
Jul
5
comment How to find closed form expression for a power series.
I think he means "I want a closed form expression for the following series:"
Jul
5
comment How to find closed form expression for a power series.
@did: you are correct, you didn't use the word once. But the OP did ask for the generating function for the series...
Jul
5
comment How to find closed form expression for a power series.
Generating functions don't need to converge, they're formal series whose coefficients are important data...
Jul
2
comment For which categories we can solve $\text{Aut}(X) \cong G$ for every group $G$?
In Set the singleton object 1 is its own group, since $\hom(\mathbf{1},\mathbf{1})\cong\mathbf{1}$...although you may reject this because it's a (canonical) isomorphism, and not an equality...
Jun
26
revised Evaluate or simplify $\int\frac{1}{\ln x}\,dx$
added 253 characters in body
Jun
26
revised Evaluate or simplify $\int\frac{1}{\ln x}\,dx$
added 253 characters in body
Jun
26
answered Evaluate or simplify $\int\frac{1}{\ln x}\,dx$
Jun
25
comment Finding $\frac{d^2 y}{dx^2}$
Let $f(x)=\mathrm{d}y/\mathrm{d}x = y'(t)/x'(t)$. Then shouldn't $\mathrm{d}f/\mathrm{d}x = f'/x'$ where primes are differentiation with respect to $t$? [It's been many years since I've done this, so I may be wrong...]
Jun
25
comment Differentiating Under the Integral Proof
I gave two proofs, one based on Leibniz's theorem, another based on dominated convergence. Thanks for pointing out how I can improve my answer, @JasonDeVito! I'm still trying to get back into the groove of mathematics, and feedback is greatly appreciated! :)
Jun
25
revised Differentiating Under the Integral Proof
added 725 characters in body
Jun
25
revised Differentiating Under the Integral Proof
added 725 characters in body
Jun
25
comment Differentiating Under the Integral Proof
Good catch, @GiuseppeNegro, I'll update my post!
Jun
25
revised Differentiating Under the Integral Proof
added 149 characters in body
Jun
25
answered Differentiating Under the Integral Proof