Ariyan Javanpeykar's user avatar
Ariyan Javanpeykar's user avatar
Ariyan Javanpeykar's user avatar
Ariyan Javanpeykar
  • Member for 14 years, 1 month
  • Last seen this week
24 votes
4 answers
6k views

Extending vector bundles on a given open subscheme

23 votes
1 answer
4k views

GAGA and Chern classes

22 votes
1 answer
854 views

Is being of general type stable under generization

20 votes
3 answers
3k views

Are schemes that "have enough locally frees" necessarily separated

19 votes
0 answers
602 views

Coarse moduli spaces of stacks for which every atlas is a scheme

18 votes
1 answer
2k views

Does the moduli space of genus three curves contain a complete genus two curve

15 votes
1 answer
1k views

Is the set of surfaces over Spec Z with ample canonical sheaf empty

14 votes
1 answer
355 views

Are any of these complex surfaces ever projective?

14 votes
4 answers
4k views

Is the Euler characteristic a birational invariant

14 votes
4 answers
1k views

Etale coverings of certain open subschemes in Spec O_K

13 votes
2 answers
1k views

Families of curves for which the Belyi degree can be easily bounded

12 votes
1 answer
554 views

Counting branched covers of the projective line and Spec Z

12 votes
2 answers
790 views

Given a family of curves, when does there exist a fibered surface over Spec Z parametrizing them?

11 votes
5 answers
8k views

When is the push-forward of the structure sheaf locally free

11 votes
1 answer
1k views

How does $f_* O_X$ measure ramification and Grothendieck-Riemann-Roch

11 votes
1 answer
1k views

Which curves have stable Faltings height greater or equal to 1

10 votes
2 answers
718 views

Families of Fano varieties over non-hyperbolic curves

10 votes
3 answers
2k views

Where does the splitting principle come from and does it generalize

10 votes
1 answer
834 views

$K_0$ of a non-separated scheme

10 votes
1 answer
763 views

Can one bound the Todd class of a 3-dimensional variety polynomially in c_3

9 votes
2 answers
1k views

Bounding the modular discriminant of an elliptic curve in the j-invariant

9 votes
2 answers
969 views

Finite etale atlas for Deligne-Mumford stacks

9 votes
1 answer
714 views

Given a curve, under which condition is the set of gonal morphisms finite

8 votes
0 answers
251 views

Simultaneous rank jumping of elliptic curves over number fields

8 votes
2 answers
954 views

Covers of the projective line over Z and arithmetic Grauert-Remmert

8 votes
1 answer
678 views

Does combining Abhyankar's Lemma and embedded resolution give horizontal normal crossings

8 votes
2 answers
905 views

Is this finite surjective flat morphism of 2 dimensional schemes a local complete intersection

8 votes
1 answer
1k views

Rational singularities for fibered surfaces

7 votes
3 answers
729 views

Family of Enriques surfaces and Grothendieck-Riemann-Roch

7 votes
1 answer
716 views

Is there a category-theoretic definition of the arithmetic Grothendieck group