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 Yearling
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Apr
5
comment Dominated convergence theorem and fundamental lemma
this looks like a meaningful question...
Mar
27
awarded  Commentator
Mar
27
awarded  Yearling
Mar
26
comment Proving that $(e^x+1)^{1/3}$ has no elementary antiderivative
well, consider my answer being done by computer, not me :-)
Mar
26
answered Proving that $(e^x+1)^{1/3}$ has no elementary antiderivative
Mar
22
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.
Feb
12
revised Ten dimensional representation of $S_6$
expanded...
Feb
11
answered Ten dimensional representation of $S_6$
Jan
21
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.
Dec
26
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
Dec
19
awarded  Caucus
Sep
29
comment What is the second least non prime order of a simple group?
PSL(3,2), not PSL(7,2)
Sep
29
answered What is the second least non prime order of a simple group?
Sep
28
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 $k$.
Sep
28
answered divisibility of number of solutions of $x_1+\cdots+x_k=n$
Sep
28
answered For all real $\theta$ prove that $ \cos(\sin\theta) \gt \sin(\cos\theta)$
Aug
8
answered Reference Request: Characters of Finite General Linear Groups
Feb
12
revised Graphical-entry knot theory program for Mac?
added a clarification
Feb
12
answered Graphical-entry knot theory program for Mac?
Dec
4
awarded  Editor