User Christian Liedtke

29 votes

Accepted

Higher dimensional version of the Hurwitz formula?

answered Aug 3, 2011 at 3:15

13 votes

Hodge numbers of reduction mod $p$

answered Dec 19, 2012 at 10:01

12 votes

When does $\operatorname{Aut}(X)=\operatorname{Bir}(X)$ hold?

answered Jan 31, 2013 at 11:54

12 votes

Use of Hilbert Schemes in Arithmetic?

answered Oct 28, 2012 at 6:58

10 votes

Divisorial contraction: when is the image an algebraic space or a stack?

answered Aug 28, 2012 at 7:59

10 votes

Generalisations of Riemann-Roch for surfaces

answered Aug 8, 2011 at 15:08

9 votes

How do non-trivial global differentials give non-trivial cohomology classes in positive characteristic

answered Sep 24, 2015 at 8:28

8 votes

Accepted

Hodge spectral sequence for algebraic stacks

answered Jul 26, 2011 at 17:48

5 votes

Characterizations of Abelian varieties (3-folds) in positive characteristic

answered Jul 30, 2011 at 20:45

5 votes

every involution of an Enriques surface is

answered Aug 31, 2011 at 2:22

5 votes

Simplest example of jumping of cohomology of structure sheaf in smooth families?

answered Jul 26, 2011 at 17:22

4 votes

Quotients of rational surfaces

answered Jan 11, 2013 at 9:38

2 votes

Why $\pi_1(X)\cong \pi_1(Y)$ for a double cover $\pi:X\to Y$ with a nef, smooth and big branch locus?

answered Oct 29, 2012 at 9:47

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13 Answers

Higher dimensional version of the Hurwitz formula?

Hodge numbers of reduction mod $p$

When does $\operatorname{Aut}(X)=\operatorname{Bir}(X)$ hold?

Use of Hilbert Schemes in Arithmetic?

Divisorial contraction: when is the image an algebraic space or a stack?

Generalisations of Riemann-Roch for surfaces

How do non-trivial global differentials give non-trivial cohomology classes in positive characteristic

Hodge spectral sequence for algebraic stacks

Characterizations of Abelian varieties (3-folds) in positive characteristic

every involution of an Enriques surface is

Simplest example of jumping of cohomology of structure sheaf in smooth families?

Quotients of rational surfaces

Why $\pi_1(X)\cong \pi_1(Y)$ for a double cover $\pi:X\to Y$ with a nef, smooth and big branch locus?