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abx
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537 Answers

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5 votes
Accepted

Are Chern classes always vertical?

8 votes

Homotopy equivalent but non-homeomorphic high-dimensional manifolds

6 votes

Why do symmetries of K3 surfaces lie in the Mathieu group $M_{24}$?

5 votes
Accepted

height of sum of prime ideals

15 votes

Area of a smooth complex projective curve

5 votes
Accepted

Orthogonal complements in exterior powers

4 votes
Accepted

Is the projective dimension of finite torsion-free modules over regular ring of dimension $n$ smaller that $n$?

5 votes
Accepted

semiample of canonical bundle in a smooth family (Campana's proof)

3 votes
Accepted

Are horizontal divisors on abelian fibered hyperkähler manifolds proportional in $NS(X)$ up to vertical divisors?

5 votes
Accepted

Existence of a holomorphic map between Riemann surfaces

4 votes
Accepted

Composition of Gysin and restriction maps on $\ell$-adic cohomology

8 votes
Accepted

Finiteness of number of extensions with bounded degree and discriminant

6 votes
Accepted

Can "fake rational surfaces" be simply-connected?

17 votes
Accepted

Is it a valuation ring?

13 votes

Invariant cohomology vs cohomology of quotient

4 votes

Biquadratic extension of global function fields with cyclic decomposition groups

9 votes
Accepted

When morphism of complexes is homotopic to 0?

2 votes
Accepted

Precise reference in Griffiths' papers : computation of the Hodge theory of a smooth projective hypersurface

1 vote
Accepted

Linear system giving the projective embedding of the tangential variety

2 votes

Completions of non-Noetherian rings with respect to finitely generated ideal

11 votes
Accepted

Automorphism of moduli space of stable vector bundles over a curve

2 votes

Moduli space of Bridgeland semistable objects: what is it?

15 votes
Accepted

Torsion points of abelian variety as zeros of a section of a vector bundle?

14 votes

Classfication of vector bundles on projective line over a local ring

2 votes
Accepted

Intermediate Jacobian under group action

3 votes

Polystable vector bundle contains a prescribed line bundle as a line subbundle

8 votes

Points on curves of genus 3

7 votes
Accepted

Roots of line bundles in a family

7 votes

Fixed-point free holomorphic involutions

9 votes
Accepted

Curves and semi-abelian varieties

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