User HNuer

19 votes

1 answer

6k views

dualizing sheaf of a nodal curve

asked Mar 15, 2011 at 18:48

16 votes

1 answer

902 views

Moduli space of curves over $\mathbb Z$

asked May 25, 2011 at 8:12

12 votes

1 answer

407 views

Can Enriques Surfaces have non-trivial TWISTED Fourier-Mukai partners?

asked Feb 19, 2015 at 11:05

11 votes

1 answer

951 views

Conditions for the contractibility of subvarieties

asked Aug 6, 2013 at 13:38

10 votes

1 answer

1k views

How does descent theory imply a sheaf is a scheme?

asked Nov 20, 2012 at 22:38

8 votes

1 answer

870 views

Why is proving fully-faithfulness of an integral functor locally analytically sufficient?

asked Aug 6, 2013 at 13:59

8 votes

3 answers

4k views

A more general form of Grauert's Theorem on Higher Direct Image Sheaves?

asked Dec 11, 2012 at 15:12

7 votes

1 answer

747 views

Analogue of Picard-Lefschetz formulas for more than one node?

asked Feb 12, 2013 at 15:01

7 votes

1 answer

865 views

Hilbert scheme of points on a surface as moduli space of semistable sheaves

asked Apr 4, 2013 at 20:19

7 votes

2 answers

3k views

Number of irreducible and connected components constant in flat families

asked Nov 29, 2012 at 16:18

7 votes

3 answers

4k views

Picard Group of Projective Bundle over an Integral scheme

asked Apr 8, 2011 at 12:10

6 votes

2 answers

1k views

On a fiber square flat pullback commutes with proper pushforward

asked Sep 15, 2011 at 15:29

6 votes

2 answers

747 views

Questions on theorem in Deligne-Mumford's '69 Paper: $\omega_C^n$ is very ample $n\geq 3$

asked Nov 20, 2012 at 19:57

6 votes

1 answer

954 views

Are formal completions along a subvariety only dependent on the normal bundle?

asked Aug 6, 2013 at 14:18

5 votes

2 answers

694 views

Crepant resolutions of ODP's on a 3-fold

asked Jun 8, 2012 at 0:26

5 votes

1 answer

1k views

Hodge numbers of a Calabi-Yau 3-fold via deformation theory

asked Jun 25, 2012 at 22:15

5 votes

2 answers

2k views

Unirational implies rationally connected

asked Dec 6, 2011 at 21:21

3 votes

2 answers

1k views

Connectedness of Centralizers in $GL_n$

asked May 16, 2011 at 13:14

3 votes

1 answer

1k views

Connecting points on a variety by the image of a nonsingular curve

asked Sep 13, 2011 at 15:34

3 votes

1 answer

346 views

Euler characteristic of nodal K3 surfaces (as in singular)

asked Dec 20, 2012 at 21:53

2 votes

1 answer

382 views

Zero and Negative Gromov-Witten invariants in genus 0

asked Jan 29, 2013 at 20:13

2 votes

1 answer

376 views

Can one determining the p-adic lattice just from the values of the quadratic form on a p-group?

asked Feb 5, 2014 at 20:40

2 votes

0 answers

212 views

What is $\mathrm{Num}(X)$ for the canonical cover $X$ of a bielliptic surface $S$?

asked Mar 23, 2016 at 16:47

2 votes

3 answers

842 views

Does finite+reduced fibers+connected fibers imply isomorphism?

asked Nov 24, 2012 at 23:08

2 votes

0 answers

444 views

Existence of the universal family for the Hilbert scheme of plane curves

asked Jun 28, 2012 at 15:08

2 votes

1 answer

354 views

T^i functors are isomorphic for analytically isomorphic isolated singular points

asked Aug 10, 2012 at 20:46

2 votes

2 answers

357 views

The vanishing of the 2nd plurigenus of a sextic threefold

asked Feb 21, 2011 at 16:30

2 votes

3 answers

594 views

Alterations factor as modification + finite map

asked Mar 1, 2011 at 10:12

2 votes

2 answers

548 views

The product of non-commuting semisimple matrices need not be semisimple

asked Mar 8, 2011 at 7:30

2 votes

2 answers

466 views

Subvarieties that dominate a dominant morphism

asked Jun 1, 2011 at 4:04

Stack Exchange Network

38 Questions

dualizing sheaf of a nodal curve

Moduli space of curves over $\mathbb Z$

Can Enriques Surfaces have non-trivial TWISTED Fourier-Mukai partners?

Conditions for the contractibility of subvarieties

How does descent theory imply a sheaf is a scheme?

Why is proving fully-faithfulness of an integral functor locally analytically sufficient?

A more general form of Grauert's Theorem on Higher Direct Image Sheaves?

Analogue of Picard-Lefschetz formulas for more than one node?

Hilbert scheme of points on a surface as moduli space of semistable sheaves

Number of irreducible and connected components constant in flat families

Picard Group of Projective Bundle over an Integral scheme

On a fiber square flat pullback commutes with proper pushforward

Questions on theorem in Deligne-Mumford's '69 Paper: $\omega_C^n$ is very ample $n\geq 3$

Are formal completions along a subvariety only dependent on the normal bundle?

Crepant resolutions of ODP's on a 3-fold

Hodge numbers of a Calabi-Yau 3-fold via deformation theory

Unirational implies rationally connected

Connectedness of Centralizers in $GL_n$

Connecting points on a variety by the image of a nonsingular curve

Euler characteristic of nodal K3 surfaces (as in singular)

Zero and Negative Gromov-Witten invariants in genus 0

Can one determining the p-adic lattice just from the values of the quadratic form on a p-group?

What is $\mathrm{Num}(X)$ for the canonical cover $X$ of a bielliptic surface $S$?

Does finite+reduced fibers+connected fibers imply isomorphism?

Existence of the universal family for the Hilbert scheme of plane curves

T^i functors are isomorphic for analytically isomorphic isolated singular points

The vanishing of the 2nd plurigenus of a sextic threefold

Alterations factor as modification + finite map

The product of non-commuting semisimple matrices need not be semisimple

Subvarieties that dominate a dominant morphism