13,769 reputation
12985
bio website front.math.ucdavis.edu/…
location Cornell
age 44
visits member for 4 years, 10 months
seen yesterday
Math professor at Cornell, PhD 1996

1d
comment Understanding a program for computing Khovanov homology
Weird, I don't know why I was insisting on reading it the other way.
2d
comment Understanding a program for computing Khovanov homology
I think your question is "how to use it", not "how it works" (in the sense of, what algorithm does it use); either way, you might make this clearer.
Aug
29
comment Submodule embeddable in a finitely generated module
Leave off finitely generated, and the answer is "projective".
Aug
28
answered Do compact groups acting irreducibly have finite subgroups which do the same?
Aug
17
awarded  Nice Answer
Aug
13
comment A special Lie subalgebra
I presume $add(x)$ means $ad(x)$?
Aug
11
answered “Mathematics talk” for five year olds
Aug
11
comment A question on non-archimedian Fourier transform
I would ordinarily think of a map $\mathcal S\to \mathcal S^0$, but you're regarding $\mathcal S^0$ as a subspace of $\mathcal S$. Is this by taking functions on $M(n)$ supported inside $GL(n)$, or is it by using the inner product somehow?
Aug
11
awarded  Nice Answer
Aug
11
revised Quotients by the additive group $\mathbb G_a$
added 31 characters in body
Aug
10
comment Quotients by the additive group $\mathbb G_a$
Fixed. $\ \ \ \ \ \ \ \ $
Aug
10
revised Quotients by the additive group $\mathbb G_a$
edited body
Aug
10
comment The target of a finite morphism $f$ is a dense open in $S$, can you extend $f$ to have target $S$?
A little more concretely: consider the sheaf of functions on $X$ that are integral over the subring of functions pulled back from $S$. Does the global $Spec$ of this sheaf of subrings give a $Y$?
Aug
9
answered Quotients by the additive group $\mathbb G_a$
Aug
9
revised Quotients by the additive group $\mathbb G_a$
fixed ldots
Aug
6
comment When is $(q^k-1)/(q-1)$ a perfect square?
Finite projective space, not plane, I would say.
Jul
31
comment Isomorphic Dual and Conjugate Representations of a Lie Algebra
Check it once and for all for the Lie algebra $End(V)$ itself. I'm voting to close as not research-level.
Jul
29
comment Poisson ideals vs. ideals generated by Poisson central elements
Okay, so the group-action analogue is that a $G$-invariant subvariety may fail to be the intersection of a number of $G$-invariant hypersurfaces.
Jul
29
answered Horn's inequalities for n matrices
Jul
29
accepted Poisson ideals vs. ideals generated by Poisson central elements