User Charles Staats

8 votes

2 answers

573 views

Small neighborhoods of singularities on varieties

asked Jul 24, 2010 at 13:56

8 votes

1 answer

742 views

Reasonable implementation of finding Gröbner bases over non-field coefficient rings

asked May 18, 2012 at 21:13

8 votes

2 answers

1k views

A name for "not quite saturated" graded modules

asked Jul 18, 2011 at 19:37

7 votes

1 answer

735 views

Can we make Buchberger's algorithm faster for a given ideal if we are allowed to vary the monomial order?

asked Jul 17, 2011 at 23:43

7 votes

3 answers

3k views

The etale fundamental group of a field

asked Apr 18, 2010 at 3:10

7 votes

2 answers

813 views

Scheme-theoretic account of why every variety embeds in a complete variety

asked Mar 1, 2011 at 0:36

7 votes

2 answers

2k views

An effective way to tell if the saturation of a homogeneous ideal is the irrelevant ideal

asked Apr 3, 2011 at 15:54

6 votes

1 answer

545 views

Is it true that no one-dimensional group variety acts transitively on $\mathbb{P}^1$?

asked Mar 23, 2011 at 23:29

5 votes

0 answers

886 views

Definition of formal schemes as formal direct limits

asked Sep 13, 2010 at 18:55

5 votes

0 answers

1k views

Is a proper monomorphism of schemes necessarily a closed immersion?

asked Nov 10, 2010 at 18:15

5 votes

3 answers

549 views

Indices for math texbooks/monographs

asked Jun 10, 2010 at 4:27

5 votes

2 answers

3k views

A direct proof that minimal primes are associated

asked Jul 6, 2010 at 17:21

5 votes

0 answers

436 views

Primary decomposition for non-affine schemes

asked Jul 7, 2010 at 0:05

5 votes

1 answer

1k views

Examples of nice reduced singularities on Hilbert schemes--Edited

asked Jun 28, 2012 at 20:37

4 votes

0 answers

443 views

What is known about "singularity types" in the Murphy's Law sense?

asked Apr 29, 2012 at 21:31

4 votes

1 answer

150 views

Hypersurfaces containing a general chain of lines

asked May 23, 2013 at 19:25

4 votes

1 answer

678 views

In what generality is the natural map $\operatorname{Hom}_R(L,M)\otimes S\to\operatorname{Hom}_{R\otimes S}(L\otimes S,M\otimes S)$ an isomorphism?

asked Aug 3, 2011 at 16:24

4 votes

1 answer

1k views

What does "composé direct" mean in mathematical French?

asked Nov 27, 2011 at 19:47

4 votes

1 answer

468 views

Relationship between the notions of "excellent ring" and "universally catenary Nagata ring"

asked Dec 1, 2011 at 19:37

4 votes

4 answers

3k views

Subtle examples of morphisms that are finite but not flat

asked Jan 14, 2012 at 20:13

4 votes

1 answer

932 views

Relative integral closure

asked Jan 18, 2012 at 20:45

4 votes

1 answer

1k views

Lifting Etale Morphisms

asked May 5, 2010 at 20:37

4 votes

4 answers

444 views

Lower bounds on the degrees of representatives of $u^n$ as $n \to \infty$

asked Sep 1, 2010 at 15:55

4 votes

2 answers

670 views

term for a "faithful" module

asked Nov 29, 2010 at 20:18

3 votes

1 answer

688 views

Making the projective closure of a normal affine variety normal

asked Sep 18, 2010 at 0:08

3 votes

1 answer

385 views

How does this notion compare to that of immersion?

asked Mar 19, 2011 at 15:38

3 votes

1 answer

171 views

If $B \subset C \subset B_g$, is $\mathrm{Spec} C \to \mathrm{Spec} B$ necessarily an open immersion?

asked Sep 3, 2010 at 20:32

3 votes

1 answer

387 views

Term for an "almost regular" sequence

asked Jul 30, 2011 at 22:56

3 votes

0 answers

495 views

An elementary proof of a criterion for $k$ sufficiently large that $M_k = \Gamma(\mathbb{P}^n, \widetilde{M}(k))$

asked Aug 12, 2011 at 4:08

3 votes

1 answer

374 views

Techniques for showing that a curve is not smoothable

asked Dec 3, 2012 at 1:14

Stack Exchange Network

69 Questions

Small neighborhoods of singularities on varieties

Reasonable implementation of finding Gröbner bases over non-field coefficient rings

A name for "not quite saturated" graded modules

Can we make Buchberger's algorithm faster for a given ideal if we are allowed to vary the monomial order?

The etale fundamental group of a field

Scheme-theoretic account of why every variety embeds in a complete variety

An effective way to tell if the saturation of a homogeneous ideal is the irrelevant ideal

Is it true that no one-dimensional group variety acts transitively on $\mathbb{P}^1$?

Definition of formal schemes as formal direct limits

Is a proper monomorphism of schemes necessarily a closed immersion?

Indices for math texbooks/monographs

A direct proof that minimal primes are associated

Primary decomposition for non-affine schemes

Examples of nice reduced singularities on Hilbert schemes--Edited

What is known about "singularity types" in the Murphy's Law sense?

Hypersurfaces containing a general chain of lines

In what generality is the natural map $\operatorname{Hom}_R(L,M)\otimes S\to\operatorname{Hom}_{R\otimes S}(L\otimes S,M\otimes S)$ an isomorphism?

What does "composé direct" mean in mathematical French?

Relationship between the notions of "excellent ring" and "universally catenary Nagata ring"

Subtle examples of morphisms that are finite but not flat

Relative integral closure

Lifting Etale Morphisms

Lower bounds on the degrees of representatives of $u^n$ as $n \to \infty$

term for a "faithful" module

Making the projective closure of a normal affine variety normal

How does this notion compare to that of immersion?

If $B \subset C \subset B_g$, is $\mathrm{Spec} C \to \mathrm{Spec} B$ necessarily an open immersion?

Term for an "almost regular" sequence

An elementary proof of a criterion for $k$ sufficiently large that $M_k = \Gamma(\mathbb{P}^n, \widetilde{M}(k))$

Techniques for showing that a curve is not smoothable