User Count Dracula

32 votes

Tangent space of Hilbert scheme

answered Sep 2, 2015 at 13:39

8 votes

Accepted

Assuming $\operatorname{depth}M\ge \operatorname{depth}N$, what can one say about $\operatorname{depth}M_p$ and $\operatorname{depth}N_p$?

answered Dec 4, 2015 at 13:52

7 votes

Excellent rings

answered Jun 23, 2015 at 13:18

6 votes

Schematic locus of algebraic spaces in fibers

answered May 18, 2017 at 14:04

5 votes

Why is $K_{\upsilon}|K$ separable for a global field $K$?

answered Dec 7, 2017 at 1:23

5 votes

Accepted

Is the regularity of finitely generated rings decidable?

answered Oct 17, 2014 at 16:50

5 votes

Accepted

Does the ring of invariants inherit normality?

answered Mar 5, 2015 at 21:32

4 votes

Accepted

Ramification divisor on curves in weighted projective space

answered Aug 26, 2015 at 14:13

3 votes

étale cohomology via Cech cocycles for a quasi-projective scheme

answered Apr 22, 2015 at 15:13

3 votes

Why is the number of irreducible components upper semicontinuous in nice situations?

answered Dec 8, 2015 at 13:14

3 votes

Accepted

Is the residual gerbe really independent of the choice of a representative?

answered Sep 10, 2015 at 19:38

2 votes

Smoothness of a subalgebra of a smooth algebra

answered Sep 11, 2015 at 19:08

2 votes

Brauer group of a product of curves

answered Sep 16, 2016 at 19:26

2 votes

Deformations of Ext rings

answered Jun 25, 2015 at 12:57

2 votes

rationality of residues of differentials

answered Jun 25, 2015 at 14:21

2 votes

Accepted

Chow groups of locally trivial affine fibrations

answered May 11, 2015 at 13:25

2 votes

Accepted

Can height one maximal ideals in the normalization contract to non-height one primes in the base?

answered May 15, 2015 at 18:18

2 votes

Accepted

Grothendieck-Verdier duality for affine morphisms

answered Jun 16, 2015 at 17:42

2 votes

Does a semistable curve descend to a regular base?

answered Jan 30, 2015 at 14:47

2 votes

In what conditions every ideal is an extension ideal? Is every prime ideal extension of prime ideal?

answered Jun 23, 2015 at 13:24

1 vote

A question about "large" indecomposable injectives over commutative rings

answered Jun 23, 2015 at 13:30

1 vote

Accepted

Normalization of a Noetherian local domain and line bundles on the punctured spectrum

answered Oct 19, 2015 at 15:31

Stack Exchange Network

22 Answers

Tangent space of Hilbert scheme

Assuming $\operatorname{depth}M\ge \operatorname{depth}N$, what can one say about $\operatorname{depth}M_p$ and $\operatorname{depth}N_p$?

Excellent rings

Schematic locus of algebraic spaces in fibers

Why is $K_{\upsilon}|K$ separable for a global field $K$?

Is the regularity of finitely generated rings decidable?

Does the ring of invariants inherit normality?

Ramification divisor on curves in weighted projective space

étale cohomology via Cech cocycles for a quasi-projective scheme

Why is the number of irreducible components upper semicontinuous in nice situations?

Is the residual gerbe really independent of the choice of a representative?

Smoothness of a subalgebra of a smooth algebra

Brauer group of a product of curves

Deformations of Ext rings

rationality of residues of differentials

Chow groups of locally trivial affine fibrations

Can height one maximal ideals in the normalization contract to non-height one primes in the base?

Grothendieck-Verdier duality for affine morphisms

Does a semistable curve descend to a regular base?

In what conditions every ideal is an extension ideal? Is every prime ideal extension of prime ideal?

A question about "large" indecomposable injectives over commutative rings

Normalization of a Noetherian local domain and line bundles on the punctured spectrum