User user41650

16 votes

2 answers

3k views

If the direct image of f preserves coherent sheaves on noetherian schemes, how to show f is proper?

asked Sep 14, 2014 at 20:26

12 votes

1 answer

531 views

Embedding of a derived category into another derived category

asked Sep 24, 2020 at 3:52

11 votes

2 answers

1k views

Does vanishing of cohomology of locally free sheaves imply affiness of scheme

asked Jan 3, 2014 at 22:00

8 votes

1 answer

313 views

rational effective implies effective?

asked Mar 14, 2017 at 0:03

8 votes

2 answers

648 views

How to compute the periodic cyclic homology of this algebra

asked Aug 19, 2023 at 19:00

7 votes

2 answers

1k views

How to characterize flasque sheaves in more functorial way?

asked Jan 5, 2014 at 9:53

5 votes

0 answers

419 views

Reconstruction of noncommutative scheme

asked Jan 3, 2014 at 22:40

5 votes

0 answers

254 views

How to prove a statement on weak del pezzo surface?

asked May 17, 2017 at 14:31

4 votes

0 answers

589 views

Euler characteristic, character of group representation and Riemann Roch theorem

asked Sep 23, 2015 at 23:31

4 votes

0 answers

334 views

Categorical proof for Chavelley theorem on affiness of scheme

asked Jan 3, 2014 at 23:19

4 votes

1 answer

588 views

On non-unital ring and algebraic geometry

asked Jan 9, 2014 at 7:51

4 votes

1 answer

296 views

Auto-equivalences of non-trivial components of derived category of $X_{18}$

asked Jun 1, 2021 at 10:00

3 votes

0 answers

386 views

What is the most useful rationality criterion of surfaces?

asked Oct 22, 2017 at 2:58

3 votes

0 answers

302 views

Are two versions of Kuznetsov components equivalent?

asked Sep 17, 2020 at 7:12

3 votes

2 answers

1k views

Homological smoothness implies projectivity?

asked Oct 30, 2013 at 3:07

3 votes

1 answer

177 views

Intersection graph of $(-1)$-class divisors on surface of general type

asked Jul 7, 2017 at 11:46

3 votes

0 answers

135 views

How to distinguish the singularities on moduli space?

asked Jul 21, 2021 at 1:42

3 votes

1 answer

179 views

Semi-orthogonal decomposition for maximally non-factorial Fano threefolds

asked Oct 3, 2022 at 13:35

3 votes

1 answer

283 views

Automorphism of moduli space of stable vector bundles over a curve

asked Jan 22, 2023 at 4:26

2 votes

0 answers

153 views

Non-triviality of a morphism

asked Jul 29, 2023 at 8:09

2 votes

0 answers

69 views

What is happening on the second step of left mutation?

asked Aug 6, 2023 at 6:38

2 votes

0 answers

219 views

Fibers of period map

asked Jul 21, 2021 at 5:35

2 votes

0 answers

159 views

Conics on Gushel-Mukai fourfold

asked Oct 28, 2021 at 10:20

2 votes

0 answers

148 views

Normal bundle of a Fano threefold as Brill-Noether loci

asked Nov 27, 2021 at 19:50

2 votes

0 answers

90 views

Cone of morphism in families

asked Aug 13, 2020 at 11:42

2 votes

1 answer

174 views

liftability of isomorphism of curves in $P^3$

asked Oct 25, 2023 at 2:18

2 votes

0 answers

38 views

Torelli theorem for veronese double cone(reference needed)

asked Nov 12, 2023 at 8:56

2 votes

1 answer

180 views

Perfect complexes of plane nodal cubic curve

asked Jan 26 at 21:42

2 votes

0 answers

94 views

What is the correct definition of intermediate Jacobian for this singular threefold?

asked Apr 11 at 17:24

2 votes

0 answers

153 views

Euler form on three-fold

asked Oct 22, 2017 at 1:15

Stack Exchange Network

62 Questions

If the direct image of f preserves coherent sheaves on noetherian schemes, how to show f is proper?

Embedding of a derived category into another derived category

Does vanishing of cohomology of locally free sheaves imply affiness of scheme

rational effective implies effective?

How to compute the periodic cyclic homology of this algebra

How to characterize flasque sheaves in more functorial way?

Reconstruction of noncommutative scheme

How to prove a statement on weak del pezzo surface?

Euler characteristic, character of group representation and Riemann Roch theorem

Categorical proof for Chavelley theorem on affiness of scheme

On non-unital ring and algebraic geometry

Auto-equivalences of non-trivial components of derived category of $X_{18}$

What is the most useful rationality criterion of surfaces?

Are two versions of Kuznetsov components equivalent?

Homological smoothness implies projectivity?

Intersection graph of $(-1)$-class divisors on surface of general type

How to distinguish the singularities on moduli space?

Semi-orthogonal decomposition for maximally non-factorial Fano threefolds

Automorphism of moduli space of stable vector bundles over a curve

Non-triviality of a morphism

What is happening on the second step of left mutation?

Fibers of period map

Conics on Gushel-Mukai fourfold

Normal bundle of a Fano threefold as Brill-Noether loci

Cone of morphism in families

liftability of isomorphism of curves in $P^3$

Torelli theorem for veronese double cone(reference needed)

Perfect complexes of plane nodal cubic curve

What is the correct definition of intermediate Jacobian for this singular threefold?

Euler form on three-fold