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Dmitry Kerner's user avatar
Dmitry Kerner's user avatar
Dmitry Kerner's user avatar
Dmitry Kerner
  • Member for 14 years, 4 months
  • Last seen more than 3 years ago
12 votes
2 answers
2k views

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

11 votes
2 answers
2k views

Groups of matrices that preserve several quadratic forms

11 votes
2 answers
979 views

Parameter space for complete intersections and their discriminant

10 votes
2 answers
494 views

Inequalities for averaging over partially ordered sets

10 votes
3 answers
2k views

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

9 votes
0 answers
410 views

min/max of degenerate critical points and Newton diagrams

8 votes
1 answer
308 views

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

7 votes
1 answer
932 views

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

7 votes
1 answer
615 views

automorphisms of local rings vs local change of coordinates

6 votes
0 answers
208 views

which automorphisms of a subring extend to those of a ring

6 votes
1 answer
2k views

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

5 votes
1 answer
488 views

how to pass from algebraic power series to the analytic ones

4 votes
0 answers
153 views

rings with 'flat functions'

4 votes
1 answer
480 views

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

4 votes
1 answer
869 views

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

4 votes
0 answers
573 views

A combinatorial bound involving Stirling numbers of the second type

4 votes
0 answers
350 views

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

4 votes
0 answers
846 views

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

3 votes
0 answers
204 views

the annihilator of cokernel in a particular case

3 votes
1 answer
605 views

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

3 votes
0 answers
166 views

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

3 votes
1 answer
398 views

Defining ideals for rational curves in space

3 votes
0 answers
197 views

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

3 votes
1 answer
662 views

Higher Euler characteristics (possible generalizations)

3 votes
2 answers
823 views

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

3 votes
3 answers
663 views

on the relative conductor of curve singularity and quotient of ideals

3 votes
0 answers
306 views

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

3 votes
1 answer
394 views

the pfaffian-adjugate and its counterparts for matrices odd size

2 votes
0 answers
132 views

some sort of 'saturation' of module quotients

2 votes
1 answer
189 views

what are the possible approximations for ideals