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tarosano
  • Member for 13 years, 2 months
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8 votes
1 answer
2k views

Does a small contraction occur between smooth varieties?

6 votes
0 answers
365 views

Lefschetz type injectivity on Picard groups of an ample $\mathbb{Q}$-Cartier divisor

6 votes
1 answer
2k views

exact sequence of logarithmic differential sheaves associated to an effective Cartier divisor on a smooth variety

5 votes
0 answers
306 views

abel jacobi maps for singular curves?

4 votes
1 answer
807 views

hypercohomology of logarithmic de Rham complex of complement of smooth divisor in smooth variety

4 votes
1 answer
547 views

pullback or push forward of logarithmic differential sheaf by cyclic cover

3 votes
1 answer
314 views

Example of 2-dimensional hypersurface singularity whose exceptional locus of minimal resolution is not normal crossing

3 votes
1 answer
1k views

Exceptional locus of a projective birational morphism between smooth varieties

3 votes
2 answers
2k views

Reference on an equivariant resolution of singularities

3 votes
1 answer
1k views

Blowing up intersections of two divisors make them disjoint?

3 votes
1 answer
375 views

An example of a Calabi-Yau 3-fold with irrational nef cone?

2 votes
2 answers
199 views

Lifting invertible functions on a divisor to ambient affine variety

2 votes
0 answers
310 views

The Lefschetz hyperplane section theorem for class groups

2 votes
0 answers
263 views

Do deformations of isolated hypersurface singularity naturally induce deformations of their divisors?

2 votes
0 answers
257 views

Is there a KLT Fano variety with a normal anticanonical element?

2 votes
1 answer
393 views

Noether-Lefschetz theorem for branched covering?

2 votes
1 answer
266 views

Determine complex analytic germ along a smooth compact curve via normal bundle?

2 votes
1 answer
495 views

Question about arguments using Du Bois complex

2 votes
0 answers
217 views

Invariance of anti-plurigenus of Fano varieties with canonical singularities under small deformation?

2 votes
1 answer
181 views

$H^1$ of a certain line bundle on the resolution of a 2-dimensional hypersurface singularity

2 votes
0 answers
352 views

Is the invariant part of the canonical module by finite group action nonzero?

1 vote
0 answers
76 views

$H^1$ of a certain line bundle on the resolution of a divisor on a terminal quotient singularity

1 vote
1 answer
236 views

Does an essential resolution of 2-dimensional hypersurface singularity preserves

1 vote
1 answer
467 views

Injective hulls of residue fields of a local ring and its ring invariants by finite group action

1 vote
1 answer
583 views

general element of anticanonical linear system of certain log del pezzo surfaces

1 vote
0 answers
180 views

Does obstruction class for deformations of a pair $(X,D)$ lie in ${\rm Ext}^2(\Omega^1(\log D), \mathcal{O}_X)$ when $X$ is singular?

1 vote
1 answer
188 views

Vanishing of $H^0( D, \hat{\Omega}^1_D)$ on simply connected surface $D$?

1 vote
0 answers
222 views

Does tensoring by a reflexive sheaf induce isomorphism between Ext groups?

1 vote
0 answers
177 views

Certain vanishing of local cohomology supported on some exceptional divisor

1 vote
1 answer
193 views

Adding singular equations to a smoothing of a hypersurface singularity