Yes, I do contribute (very little though) to mathoverflow.net. E.g. I wrote some response to entries:
What are some famous rejections of correct mathematics?
What is the recent development of D-module and representation theory of Kac-Moody algebra?
Quasi-coherent sheaves in the Functor-of-points approach
Why do my quantum group books avoid homotopical language?
Is Higher K-functor the derived functor of K0?
differential operator in noncommutative geometry?
What is the relation between quantum symmetry and quantum groups?
How to unify various reconstruction theorems (Gabriel-Rosenberg, Tannaka,Balmers)
How helpful is non-standard analysis?
Is there triangulated category version of Barr-Beck’s theorem?
Why Drinfel’d-Jimbo-type Quantum Groups?
What does the generating function x(1−e−x) count?
Motivation for algebraic K-theory?
Hopf algebra structure on the universal enveloping algebra of a Leibniz algebra?
What is an algebraic group over a noncommutative ring?
Motivation for Cosuspended Category Axioms
How to interpret the Sugawara construction from a physical or mathematical viewpoint?
Reference for quantum Schur-Weyl duality
Introduction to deformation theory (of algebras)?
I did not comment to but some of the following MathOverflow entries captured my interest:
loop-spaces-as-generalized-smooth-spaces-or-as-infinite-dimensional-manifolds
is-there-a-categorical-description-of-grothendiecks-algebra-of-differential-op
why-is-this-not-an-algebraic-space
formal-geometry after Gel’fand
topologists-loops-versus-algebraists-loops
In particular, almost any answer given by David Ben-Zvi is very useful to my interests: MO users:david-ben-zvi. e.g.
Last revised on March 15, 2010 at 15:36:49. See the history of this page for a list of all contributions to it.