bio  website  front.math.ucdavis.edu/… 

location  Cornell  
age  44  
visits  member for  4 years, 10 months 
seen  yesterday  
stats  profile views  9,706 
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 nonarchimedian 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 $(q^k1)/(q1)$ 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 researchlevel. 
Jul 29 
comment 
Poisson ideals vs. ideals generated by Poisson central elements
Okay, so the groupaction 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 