TonyS's user avatar
TonyS's user avatar
TonyS's user avatar
TonyS
  • Member for 14 years, 2 months
9 votes
2 answers
638 views

Cohomology of quaternions on an abelian variety

7 votes
1 answer
2k views

Does local triviality in the fppf topology imply local triviality in the etale topology?

7 votes
2 answers
695 views

Bimodules over division rings

7 votes
1 answer
758 views

Extensions of torsion modules

5 votes
2 answers
903 views

Chern classes in flat families

5 votes
1 answer
2k views

Length of a module over different rings

5 votes
1 answer
2k views

Generalized Beilinson spectral sequences

4 votes
1 answer
528 views

Serre duality and low dimensional cohomology groups

4 votes
1 answer
576 views

Extension of a first order deformation of a sheaf

4 votes
1 answer
540 views

Base change and relative Ext over noncommutative rings

3 votes
1 answer
1k views

Chern classes of the direct image of an ideal sheaf resp. skyscraper sheaf

3 votes
1 answer
465 views

Sequences of groups, exact not just in étale but also in the Zariski topology

3 votes
0 answers
239 views

How to find special hermitian metrics on vector bundles

3 votes
1 answer
289 views

Families of sheaves on arithmetic varieties

3 votes
2 answers
553 views

Comparing homomorphisms over different base rings

3 votes
2 answers
457 views

Chern character of Hom-sheaves

3 votes
1 answer
562 views

When does the forgetful functor S-Mod -> R-Mod induce injective maps on Ext-groups?

3 votes
1 answer
511 views

Do cohomologically trivial line bundles affect morphisms?

3 votes
1 answer
738 views

How to find the action of an automorphism on the 27 lines on a cubic surface?

2 votes
1 answer
1k views

Direct image sheaf and tensor product (is the projection formula an isomorphism?)

2 votes
1 answer
753 views

How does torsion behave under the direct image functor?

2 votes
2 answers
386 views

Are morphisms of finite length modules determined by the behaviour of the simple modules?

2 votes
2 answers
248 views

Is restricting the support of an Artinian sheaf a closed condition?

2 votes
0 answers
127 views

Properties of special Cayley-Bacharach bundles on a K3-surface

2 votes
1 answer
337 views

Flatness of the canonical projections

2 votes
2 answers
321 views

Line bundles on special abelian surfaces

2 votes
3 answers
628 views

Connection: locally free - locally projective

2 votes
1 answer
2k views

Definition of a complex structure on a vector bundle

2 votes
1 answer
667 views

When is the restriction map on global sections an embedding

2 votes
1 answer
238 views

Behaviour of Morita equivalence in families of sheaves