User Dmitry Kerner

13 votes

2 answers

2k views

Basics of classification of trilinear forms (when is it non-discrete)

asked Feb 10, 2013 at 11:54

11 votes

2 answers

2k views

Groups of matrices that preserve several quadratic forms

asked Jul 6, 2012 at 9:39

11 votes

2 answers

1k views

Parameter space for complete intersections and their discriminant

asked Oct 7, 2012 at 6:54

10 votes

2 answers

496 views

Inequalities for averaging over partially ordered sets

asked Dec 6, 2013 at 9:58

10 votes

3 answers

2k views

on chern classes and Riemann Roch theorem for torsion-free sheaves on singular (possibly multiple) curve

asked Dec 30, 2009 at 9:33

9 votes

0 answers

412 views

min/max of degenerate critical points and Newton diagrams

asked May 31, 2010 at 18:30

8 votes

1 answer

313 views

When two determinantal ideals together generate a power of the maximal ideal?

asked Jan 3, 2013 at 12:02

7 votes

1 answer

974 views

what can be reached by flat degeneration of (globally) complete intersection?

asked May 24, 2012 at 19:51

7 votes

1 answer

621 views

automorphisms of local rings vs local change of coordinates

asked Jan 5, 2015 at 8:17

6 votes

0 answers

217 views

which automorphisms of a subring extend to those of a ring

asked Nov 9, 2012 at 9:50

6 votes

1 answer

2k views

when is a section of vector bundle determined by its zero locus?

asked Jun 2, 2011 at 21:23

5 votes

1 answer

509 views

how to pass from algebraic power series to the analytic ones

asked Apr 2, 2017 at 18:56

4 votes

0 answers

155 views

rings with 'flat functions'

asked Sep 23, 2015 at 19:47

4 votes

1 answer

499 views

Artin approximation theorems over non-regular rings/non-Noetherian rings

asked Feb 27, 2013 at 20:29

4 votes

1 answer

886 views

A bound involving Stirling numbers of the second kind and the asymptotics

asked Sep 14, 2011 at 2:34

4 votes

0 answers

578 views

A combinatorial bound involving Stirling numbers of the second type

asked Sep 18, 2011 at 2:57

4 votes

0 answers

350 views

Artin approximation theorem for analytic functions over a field of zero characteristic

asked Oct 12, 2010 at 16:18

4 votes

0 answers

896 views

A strong form of implicit function theorem (what happens when the derivative is degenerate?)

asked Jun 6, 2014 at 21:08

3 votes

0 answers

212 views

the annihilator of cokernel in a particular case

asked Jun 24, 2014 at 5:22

3 votes

1 answer

614 views

working with local rings: "abstract" vs "geometric" proofs

asked Feb 17, 2013 at 16:20

3 votes

0 answers

169 views

Is there some short formula for the "defect" of Hilbert function

asked May 9, 2011 at 15:58

3 votes

1 answer

415 views

Defining ideals for rational curves in space

asked Mar 26, 2012 at 19:58

3 votes

0 answers

197 views

which deformation of a matrix lead to flat deformations of determinantal varieties (fitting ideals)?

asked Nov 7, 2012 at 14:18

3 votes

1 answer

688 views

Higher Euler characteristics (possible generalizations)

asked Jul 30, 2012 at 6:20

3 votes

2 answers

828 views

Counting integral points of a polytope in R^3 (the c_1 coefficient of Ehrhart polynomial)

asked Nov 17, 2010 at 18:27

3 votes

3 answers

670 views

Algebraic, analytic, formal modules

asked Aug 6, 2010 at 20:18

3 votes

3 answers

681 views

on the relative conductor of curve singularity and quotient of ideals

asked Feb 12, 2011 at 3:53

3 votes

0 answers

320 views

a generalization of the annihilator of cokernel ideal (some new invariants of modules?) [closed]

asked Sep 25, 2014 at 7:33

3 votes

1 answer

403 views

the pfaffian-adjugate and its counterparts for matrices odd size

asked Jan 15, 2016 at 15:15

2 votes

0 answers

134 views

some sort of 'saturation' of module quotients

asked Jul 19, 2015 at 19:29

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49 Questions

Basics of classification of trilinear forms (when is it non-discrete)

Groups of matrices that preserve several quadratic forms

Parameter space for complete intersections and their discriminant

Inequalities for averaging over partially ordered sets

on chern classes and Riemann Roch theorem for torsion-free sheaves on singular (possibly multiple) curve

min/max of degenerate critical points and Newton diagrams

When two determinantal ideals together generate a power of the maximal ideal?

what can be reached by flat degeneration of (globally) complete intersection?

automorphisms of local rings vs local change of coordinates

which automorphisms of a subring extend to those of a ring

when is a section of vector bundle determined by its zero locus?

how to pass from algebraic power series to the analytic ones

rings with 'flat functions'

Artin approximation theorems over non-regular rings/non-Noetherian rings

A bound involving Stirling numbers of the second kind and the asymptotics

A combinatorial bound involving Stirling numbers of the second type

Artin approximation theorem for analytic functions over a field of zero characteristic

A strong form of implicit function theorem (what happens when the derivative is degenerate?)

the annihilator of cokernel in a particular case

working with local rings: "abstract" vs "geometric" proofs

Is there some short formula for the "defect" of Hilbert function

Defining ideals for rational curves in space

which deformation of a matrix lead to flat deformations of determinantal varieties (fitting ideals)?

Higher Euler characteristics (possible generalizations)

Counting integral points of a polytope in R^3 (the c_1 coefficient of Ehrhart polynomial)

Algebraic, analytic, formal modules

on the relative conductor of curve singularity and quotient of ideals

a generalization of the annihilator of cokernel ideal (some new invariants of modules?) [closed]

the pfaffian-adjugate and its counterparts for matrices odd size

some sort of 'saturation' of module quotients