Sasha's user avatar
Sasha's user avatar
Sasha's user avatar
Sasha
  • Member for 14 years
  • Last seen this week
43 votes
Accepted

Sheaves without global sections

33 votes
Accepted

How do you describe vector bundles on elliptic curves?

30 votes
Accepted

A down-to-earth introduction to the uses of derived categories

29 votes
Accepted

Composing left and right derived functors

29 votes
Accepted

Extending vector bundles on a given open subscheme, reprise

23 votes
Accepted

Push-forward of locally free sheaves

22 votes

Understanding Adjointness of Sheaves in Algebraic Geometry

21 votes
Accepted

Is there a lift of the q-Vandermonde identity to some geometric (motivic) identity for Grassmannians over $F_q$?

20 votes

Applications of Grothendieck-Riemann-Roch?

20 votes

Natural examples of sequences of adjoint functors

20 votes
Accepted

Automorphisms of a weighted projective space

19 votes

When does the direct image functor commute with tensor products?

17 votes
Accepted

Is Tor always torsion?

17 votes

Extending vector bundles on a given open subscheme

16 votes

Duals and Tensor products

16 votes

The derived category of the heart of a t-structure

16 votes

Reference request: Grassmannian and Plucker coordinates in type B, C, D

15 votes

Map of Grassmannians associated with a Veronese embedding

15 votes

Abel-Jacobi map on symmetric product of genus 4 curve

15 votes
Accepted

Does a resolution of a rational singularity have rationally connected fibers?

15 votes
Accepted

Atiyah class for non-locally free sheaf

15 votes
Accepted

Chern classes in flat families

15 votes

Morphism between projective varieties

14 votes
Accepted

Birational morphism that is not successive blow-down along smooth centers?

14 votes
Accepted

If $X$ is a smooth $G$-variety with trivial canonical bundle, then does $X^G$ also have trivial canonical bundle?

14 votes

The ring of global sections of a regular scheme

14 votes
Accepted

schemes having same reduced underlying space and same cotangent sheaf are isomorphic?

13 votes

Finite surjective morphism of normal varieties and Galois coverings

13 votes

Are Du Val singularities smoothable?

13 votes
Accepted

Planes in Lagrangian Grassmannians

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