Jason Starr's user avatar
Jason Starr's user avatar
Jason Starr's user avatar
Jason Starr
  • Member for 14 years, 5 months
  • Last seen this week
40 votes

Examples of great mathematical writing

35 votes
Accepted

Does every sheaf embed into a quasicoherent sheaf?

30 votes

Is the determinant equal to a determinant?

28 votes
Accepted

Is an affine fibration over an affine space necessarily trivial?

26 votes
Accepted

what is the cyclic cover trick?

24 votes
Accepted

Can every curve be written as $f(x)=g(y)$?

24 votes
Accepted

A characterisation of $\mathbb{P}^n$

22 votes
Accepted

Do compact complex manifolds fall into countably many families?

21 votes

Which functor does the blowing up represent?

18 votes
Accepted

Is the complement of an affine open in an abelian variety ample?

17 votes
Accepted

Blow-up in family

17 votes
Accepted

Global sections of flat scheme also flat?

17 votes

Does vanishing of cohomology of locally free sheaves imply affiness of scheme

16 votes

Automorphisms of cartesian products of curves

16 votes

Restriction of the Picard group of a surface to a curve

16 votes
Accepted

Smooth projective models of Severi-Brauer varieties over a DVR are also Severi-Brauer varieties

16 votes
Accepted

Étale cohomology of morphism whose fibers are vector spaces

15 votes

What is the main failure in using Naive Chow group in Artin Stack

15 votes
Accepted

Let $F:\mathscr{A}\to\mathscr{B}$ be an equivalence of Abelian categories. Must $F$ be additive?

15 votes
Accepted

quotient by finite group actions that are smooth

14 votes

When is the determinant of the push-forward of an ample line bundle ample

14 votes

Existence of zero cycles of degree one vs existence of rational points

14 votes
Accepted

Specialisation of rigid varieties

14 votes
Accepted

Bijection implies isomorphism for algebraic varieties

14 votes
Accepted

Counting Hilbert polynomials of projective varieties

14 votes
Accepted

smoothness of Hurwitz spaces with arbitrary ramification profiles

14 votes
Accepted

The homology groups of the smooth locus of a singular variety

13 votes
Accepted

Rational curves on the Fermat quartic surface

13 votes
Accepted

Is every complex rational algebraic variety simply connected for the Euclidean topology?

13 votes
Accepted

Is "quotient" of projective variety projective?

1
2 3 4 5
23