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HNuer
  • Member for 13 years, 1 month
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19 votes
1 answer
5k views

dualizing sheaf of a nodal curve

16 votes
1 answer
882 views

Moduli space of curves over $\mathbb Z$

12 votes
1 answer
400 views

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

11 votes
1 answer
867 views

Conditions for the contractibility of subvarieties

10 votes
1 answer
1k views

How does descent theory imply a sheaf is a scheme?

9 votes
1 answer
853 views

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

8 votes
3 answers
4k views

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

7 votes
1 answer
828 views

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

7 votes
2 answers
2k views

Number of irreducible and connected components constant in flat families

7 votes
3 answers
4k views

Picard Group of Projective Bundle over an Integral scheme

6 votes
2 answers
1k views

On a fiber square flat pullback commutes with proper pushforward

6 votes
2 answers
727 views

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

6 votes
1 answer
710 views

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

5 votes
1 answer
868 views

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

5 votes
2 answers
660 views

Crepant resolutions of ODP's on a 3-fold

5 votes
1 answer
1k views

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

5 votes
2 answers
1k views

Unirational implies rationally connected

3 votes
2 answers
1k views

Connectedness of Centralizers in $GL_n$

3 votes
1 answer
1k views

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

3 votes
1 answer
335 views

Euler characteristic of nodal K3 surfaces (as in singular)

2 votes
1 answer
373 views

Zero and Negative Gromov-Witten invariants in genus 0

2 votes
1 answer
357 views

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

2 votes
0 answers
204 views

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

2 votes
3 answers
805 views

Does finite+reduced fibers+connected fibers imply isomorphism?

2 votes
0 answers
434 views

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

2 votes
1 answer
353 views

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

2 votes
2 answers
353 views

The vanishing of the 2nd plurigenus of a sextic threefold

2 votes
3 answers
568 views

Alterations factor as modification + finite map

2 votes
2 answers
523 views

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

2 votes
2 answers
444 views

Subvarieties that dominate a dominant morphism