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Chen
  • Member for 10 years, 7 months
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11 votes
1 answer
630 views

Deformation invariance of Fano varieties

8 votes
1 answer
438 views

Is an open subscheme of a rationally connected variety, rationally connected?

6 votes
1 answer
327 views

Naive question on local cohomology

6 votes
0 answers
161 views

Whitney stratification for proper morphisms

5 votes
0 answers
193 views

Intermediate Jacobian of abelian varieties

5 votes
0 answers
136 views

Poincare duality in families of smooth, projective curves

5 votes
1 answer
1k views

Is projective morphism with projective fiber flat?

5 votes
1 answer
2k views

On Serre's twisting sheaf

4 votes
0 answers
377 views

Fibers of flat morphism

4 votes
1 answer
460 views

Why should we study deformations of perfect complexes

4 votes
1 answer
524 views

Is blowing down functorial?

4 votes
1 answer
1k views

Dimension of the global sections of the Serre twisting sheaf on a curve

4 votes
1 answer
355 views

Examples of smooth projective varieties with "nice" Picard group

3 votes
1 answer
332 views

Cohomology with compact support

3 votes
0 answers
120 views

Degeneration of cycle class map

3 votes
1 answer
369 views

On equations defining space curves

3 votes
0 answers
224 views

Obstruction to lifting coherent sheaves on discrete valuation ring

3 votes
0 answers
208 views

Relation between Castelnuovo-Mumford regularity for coherent sheaves and modules

3 votes
1 answer
783 views

Is the support of a flat module generically flat?

3 votes
0 answers
134 views

Minimal extension of local systems

3 votes
0 answers
163 views

non-singular divisors of the jacobian variety

3 votes
1 answer
252 views

On tensor product of field extensions

2 votes
0 answers
387 views

Flatness of modules over dual numbers

2 votes
1 answer
188 views

When is the singularity of a semi-normal variety a double point singularity

2 votes
0 answers
232 views

Surjective map from a globally generated vector bundle to its determinant

2 votes
1 answer
295 views

Semi-continuity in quasi-finite morphisms without properness

2 votes
2 answers
943 views

Is the moduli space of stable vector bundles over a smooth projective curve fano?

2 votes
0 answers
462 views

Pullback of global sections of twisted ideal sheaves

2 votes
2 answers
307 views

Projective surfaces with vanishing first cohomology

2 votes
0 answers
157 views

Linear projection from a point preserves flatness