Dima Pasechnik
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 Apr5 comment Dominated convergence theorem and fundamental lemma this looks like a meaningful question... Mar27 awarded Commentator Mar27 awarded Yearling Mar26 comment Proving that $(e^x+1)^{1/3}$ has no elementary antiderivative well, consider my answer being done by computer, not me :-) Mar26 answered Proving that $(e^x+1)^{1/3}$ has no elementary antiderivative Mar22 comment Determinant of a Vandermonde matrix of roots of monic polynomial with integer coefficients the square of the Vandermonde is a symmetric function, and thus Per's argument applies. Feb12 revised Ten dimensional representation of $S_6$ expanded... Feb11 answered Ten dimensional representation of $S_6$ Jan21 comment How unitarize an irreducible representation of a finite group? In fact you don't need to compute eigenvalues and eigenvectors. Although you will still need to compute square roots of real cyclotomics at the end, as I mentioned in GAP forum. Dec26 comment symmetrizability of generalised cartan matrix either wikipedia is wrong, or this is by definition: en.wikipedia.org/wiki/Cartan_matrix en.wikipedia.org/wiki/Symmetric_matrix#Symmetrizable_matrix Dec19 awarded Caucus Sep29 comment What is the second least non prime order of a simple group? PSL(3,2), not PSL(7,2) Sep29 answered What is the second least non prime order of a simple group? Sep28 comment divisibility of number of solutions of $x_1+\cdots+x_k=n$ I'm not 100% sure, but it seems that if $\gcd(n,k)=1$ then all the $k$ cyclic $k$-shifts of a solution are different. This means that the number of solutions is divisible by $k$. Sep28 answered divisibility of number of solutions of $x_1+\cdots+x_k=n$ Sep28 answered For all real $\theta$ prove that $\cos(\sin\theta) \gt \sin(\cos\theta)$ Aug8 answered Reference Request: Characters of Finite General Linear Groups Feb12 revised Graphical-entry knot theory program for Mac? added a clarification Feb12 answered Graphical-entry knot theory program for Mac? Dec4 awarded Editor