User Will Sawin

222 votes

4 answers

16k views

A game on Noetherian rings

asked Apr 6, 2012 at 3:24

58 votes

3 answers

4k views

What is the geometry of an undecidable diophantine equation?

asked Dec 4, 2012 at 18:20

57 votes

0 answers

3k views

Grothendieck's Period Conjecture and the missing p-adic Hodge Theories

asked Mar 15, 2015 at 21:18

30 votes

1 answer

2k views

Enriques surfaces over $\mathbb Z$

asked Mar 27, 2015 at 22:19

29 votes

0 answers

1k views

A modern perspective on the relationship between Drinfeld modules and shtukas

asked Aug 24, 2017 at 16:54

28 votes

1 answer

2k views

How many polynomial Morse functions on the sphere?

asked Mar 29, 2013 at 21:18

27 votes

1 answer

851 views

Why do the adjoint representations of three exceptional groups have the same first eight moments?

asked Feb 20, 2016 at 15:10

25 votes

1 answer

3k views

When (or why) is a six-functor formalism enough?

asked Mar 11, 2023 at 16:11

23 votes

1 answer

2k views

What do Hecke eigensheaves actually look like?

asked Apr 20, 2016 at 6:58

21 votes

3 answers

1k views

Does X(13) have potentially good reduction at 13?

asked Mar 16, 2016 at 16:03

21 votes

1 answer

717 views

How long can this string of digits be extended?

asked Apr 8, 2013 at 22:31

21 votes

1 answer

3k views

What is the best homology/cohomology theory for the Lefschetz fixed point theorem?

asked Sep 25, 2011 at 20:37

20 votes

2 answers

2k views

Without choice, can every homomorphism from a profinite group to a finite group be continuous?

asked Sep 3, 2012 at 3:40

19 votes

1 answer

740 views

$\Lambda$-Ring Structures on $\mathbb A^2$

asked Oct 14, 2012 at 19:25

19 votes

1 answer

2k views

What do formal group laws of height $\geq 3$ look like?

asked Mar 9, 2013 at 5:48

19 votes

1 answer

436 views

Precise estimate for probability an $n$-point set has diameter smaller than $1$

asked Apr 4, 2016 at 0:39

19 votes

0 answers

552 views

Large values of characters of the symmetric group

asked Feb 20, 2023 at 14:22

18 votes

2 answers

1k views

Explicit invariant of tensors nonvanishing on the diagonal

asked Jan 8, 2017 at 18:38

18 votes

2 answers

1k views

Are rationally connected varieties robustly simply connected?

asked Sep 6, 2015 at 18:18

17 votes

1 answer

632 views

How many ways can one cover $\mathbb Q_p$ with the images of polynomials?

asked Nov 15, 2012 at 6:22

16 votes

1 answer

455 views

What sets of primes can we pick out with first-order statements?

asked Feb 14, 2013 at 18:59

16 votes

0 answers

530 views

What can be the dimension of a pointless smooth proper Z-scheme?

asked Nov 7, 2012 at 7:08

16 votes

3 answers

4k views

Which functions have all derivatives everywhere positive?

asked Jan 26, 2012 at 17:41

16 votes

0 answers

1k views

What is the expected dimension of the Zariski closure of the rational points on the moduli space of curves?

asked Nov 14, 2014 at 1:58

15 votes

0 answers

424 views

Counting abelian varieties over finite fields in a given isogeny class

asked Sep 11, 2015 at 21:15

15 votes

2 answers

2k views

What conjectures in anabelian geometry are false?

asked Nov 10, 2012 at 18:11

15 votes

3 answers

670 views

The geometry of the solution set of a symmetric equation in four symmetric matrices

asked Aug 22, 2017 at 18:40

14 votes

0 answers

884 views

Degrees of maps from curves to $\mathbb P^1$

asked Jul 7, 2014 at 17:25

13 votes

1 answer

944 views

Which degree does a motivic Galois representation show up in?

asked Jun 19, 2015 at 2:49

13 votes

1 answer

636 views

Can every finite poset be realized as divisors of an algebraic curve?

asked Jan 23, 2012 at 18:57

Stack Exchange Network

95 Questions

A game on Noetherian rings

What is the geometry of an undecidable diophantine equation?

Grothendieck's Period Conjecture and the missing p-adic Hodge Theories

Enriques surfaces over $\mathbb Z$

A modern perspective on the relationship between Drinfeld modules and shtukas

How many polynomial Morse functions on the sphere?

Why do the adjoint representations of three exceptional groups have the same first eight moments?

When (or why) is a six-functor formalism enough?

What do Hecke eigensheaves actually look like?

Does X(13) have potentially good reduction at 13?

How long can this string of digits be extended?

What is the best homology/cohomology theory for the Lefschetz fixed point theorem?

Without choice, can every homomorphism from a profinite group to a finite group be continuous?

$\Lambda$-Ring Structures on $\mathbb A^2$

What do formal group laws of height $\geq 3$ look like?

Precise estimate for probability an $n$-point set has diameter smaller than $1$

Large values of characters of the symmetric group

Explicit invariant of tensors nonvanishing on the diagonal

Are rationally connected varieties robustly simply connected?

How many ways can one cover $\mathbb Q_p$ with the images of polynomials?

What sets of primes can we pick out with first-order statements?

What can be the dimension of a pointless smooth proper Z-scheme?

Which functions have all derivatives everywhere positive?

What is the expected dimension of the Zariski closure of the rational points on the moduli space of curves?

Counting abelian varieties over finite fields in a given isogeny class

What conjectures in anabelian geometry are false?

The geometry of the solution set of a symmetric equation in four symmetric matrices

Degrees of maps from curves to $\mathbb P^1$

Which degree does a motivic Galois representation show up in?

Can every finite poset be realized as divisors of an algebraic curve?