570 reputation
210
bio website www-personal.umich.edu/…
location Ann Arbor, MI
age 30
visits member for 4 years, 11 months
seen Sep 14 at 20:34

Jul
2
awarded  Curious
Dec
31
awarded  Popular Question
Apr
8
comment Extending a vector bundle to a torsion free sheaf
Ok, I found it. Even if the pair (X,Y) does not satisfy Leff, is there a way to understand when E on Y extends to a bundle on the formal completion? Some kind of obstruction perhaps to extending to various infinitesimal thickenings of Y...
Apr
8
comment Extending a vector bundle to a torsion free sheaf
What is Leff(X,Y)?
Oct
11
awarded  Yearling
Sep
20
accepted Extending a vector bundle to a torsion free sheaf
Sep
20
asked Extending a vector bundle to a torsion free sheaf
Aug
22
awarded  Nice Question
Jan
13
asked Kahler differentials and the m-adic filtration
Oct
17
comment Frobenius manifold formulation of Fourier-Mukai duality
Technical question: Is there an argument somewhere that the Hochschild cochain complex of the DG enhancement of the derived category of coherent sheaves has the same homotopy type as a homotopy Gerstenhaber algebra to the algebra of Dolbeault polyvector fields?
Oct
11
awarded  Yearling
Aug
31
comment Regarding the Gerstenhaber bracket on Hochschild cohomology and Morita equivalence
The paper in A. Bergman's comment contains the answer to my question. Indeed, the Hochschild cochain complex of a small dg category has a B-infinity structure, which is a structure that lies between the structure of a Gerstenhaber algebra and a strong homotopy Gerstenhaber algebra. According to Keller's paper, if two small dg-categories are Morita equivalent, then their Hochschild cochain complexes are isomorphic in the homotopy category of B-infinity algebras. This implies that their Hochschild cohomologies are isomorphic as Gerstenhaber algebras.
Apr
6
awarded  Nice Question
Apr
6
accepted Are G_infinity algebras B_infinity? Vice versa?
Apr
6
revised Are G_infinity algebras B_infinity? Vice versa?
Added a bit of background and some definitions
Apr
6
asked Are G_infinity algebras B_infinity? Vice versa?
Feb
22
comment Localization of vanishing cycles
I think you can fix the jsMath rendering problems in your post by escaping the problematic math with backticks. See the box at the bottom of the "Related" list to the right.
Feb
10
accepted Is there a refinement of the Hochschild-Kostant-Rosenberg theorem for cohomology?
Feb
10
revised Regarding the Gerstenhaber bracket on Hochschild cohomology and Morita equivalence
Put in escapes to fix formatting problems
Feb
10
asked Is there a refinement of the Hochschild-Kostant-Rosenberg theorem for cohomology?