User Jason Starr - MathOverflow

Jason Starr

Member for 14 years, 6 months
Last seen this week

math.sunysb.edu/~jstarr/…
Stony Brook University, Stony Brook, NY USA

679 Answers

Score Activity Newest

6 votes

Accepted

Locally, the minimal number of ideal generators is the codimension

answered Aug 25, 2022 at 19:08

6 votes

Accepted

Example showing that $\mathbb{P}^1$ does not preserve monics

answered Dec 24, 2022 at 13:21

5 votes

Accepted

"Quasi-coherent" vector spaces in Sch/S

answered Jan 3, 2023 at 12:10

5 votes

Is it true that every vector bundle over a non compact smooth manifold is trivial at infinity?

answered Dec 13, 2022 at 12:09

5 votes

Strengthening Ax-Grothendieck

answered Nov 2, 2022 at 15:52

5 votes

Accepted

Rational points on a special class of surfaces

answered Apr 28, 2022 at 16:54

5 votes

Is every smooth projective variety contained in a chain of smooth projective varieties of increasing dimension?

answered Aug 11, 2022 at 19:49

5 votes

Accepted

Smooth projective surface with geometrically integral reduction

answered Jul 21, 2020 at 14:02

5 votes

How much do characteristic classes fail to characterize bundles?

answered Nov 1, 2021 at 20:53

5 votes

Singularities of curves that are moving

answered Jun 21, 2019 at 10:45

5 votes

Accepted

Do finite flat sheaves define families of $0$-cycles?

answered Jul 11, 2016 at 18:27

5 votes

Accepted

Extending a prime divisor to a principal divisor

answered May 24, 2016 at 18:08

5 votes

Accepted

Finite generation of global sections of an invertible sheaf on a quasi-projective scheme

answered Jun 1, 2016 at 11:16

5 votes

Direct limits and sheaf cohomology on non-compact complex manifolds

answered Dec 4, 2016 at 12:20

5 votes

Birational Group Law

answered Nov 11, 2016 at 2:03

5 votes

Accepted

Resolution of an isolated cyclic quotient singularity

answered Dec 25, 2016 at 18:46

5 votes

B-invariant subvarieties

answered Feb 1, 2017 at 13:50

5 votes

Vanishing of some Ext groups of coherent sheaves

answered Mar 20, 2017 at 12:20

5 votes

Accepted

Local nontriviality of genus-one curves over extensions of degree dividing $6^n$

answered Apr 1, 2016 at 13:28

5 votes

Lefschetz on étale fundamental group for quasi-projective varieties

answered Feb 10, 2016 at 13:06

5 votes

Accepted

Existence of pencils on some special curves of genus 10

answered Dec 18, 2015 at 13:08

5 votes

Accepted

Are automorphism groups of polarized varieties of finite type

answered Jul 31, 2015 at 14:34

5 votes

Any three plane conics has a line meeting them in a configuration of points with an order 5 symmetry

answered Aug 8, 2015 at 6:03

5 votes

Conjugation in associative algebras over finite fields

answered Aug 16, 2015 at 21:28

5 votes

Accepted

Example of Genus 7 Curve whose Conormal Sheaf isn't Locally Free

answered Aug 10, 2015 at 14:52

5 votes

Accepted

Is the locus of points which have irreducible fibers constructible?

answered Sep 5, 2015 at 1:29

5 votes

Accepted

Connected components of infinite type schemes

answered Feb 5, 2018 at 17:43

5 votes

Accepted

Torsors over complete local fields

answered Apr 13, 2018 at 12:04

5 votes

Accepted

Forms of automorphism groups of algebraic varieties

answered Mar 5, 2018 at 12:05

5 votes

Accepted

Obstructions to simultaneous resolution

answered May 30, 2018 at 15:06

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