Jeff Yelton's user avatar
Jeff Yelton's user avatar
Jeff Yelton's user avatar
Jeff Yelton
  • Member for 11 years, 9 months
  • Last seen more than 1 year ago
12 votes
0 answers
457 views

Writing an element of a free product of $C_2$'s as a product of order-$2$ elements

11 votes
1 answer
793 views

Galois representations for the curve $y^{2} = x^{3} - x$

10 votes
3 answers
676 views

Low-dimensional irreducible 2-modular representations of the symmetric group

7 votes
1 answer
340 views

elements of the pure braid group seen as Galois automorphisms

6 votes
2 answers
423 views

paper by Nakata on 2-adic Galois representations

6 votes
1 answer
569 views

realizing uniform boundedness of Galois representations associated to elliptic curves

6 votes
2 answers
729 views

actions of the absolute Galois group and the motivic Galois group on étale cohomology

6 votes
1 answer
531 views

first group cohomology for the standard representation of $S_n$ over $\mathbb{F}_2$

5 votes
0 answers
127 views

subgroups of $\mathrm{Sp}_{2g}(\mathbb{Z}_2)$ whose mod-2 image is the symmetric group

5 votes
1 answer
217 views

What can we say about the differences between roots of a polynomial with large Galois group?

4 votes
1 answer
150 views

Density of $\Gamma(N)$ in $\operatorname{Sp}_{2g}(\mathbb{Z}_{\ell})$ where $\ell \nmid N$

3 votes
1 answer
831 views

Isomorphism between a mapping class group and the fundamental group of a moduli space

3 votes
0 answers
175 views

uniqueness of quotients of principal congruence subgroups

3 votes
2 answers
1k views

generators of principal congruence subgroups and Sage package

3 votes
0 answers
297 views

field of definition of isogenies of abelian varieties

3 votes
1 answer
232 views

subgroups of $\mathrm{Sp}_{2g}(\mathbb{Z})$ generated by powers of transvections

3 votes
0 answers
180 views

alternate interpretations of Galois action on Tate module

3 votes
2 answers
397 views

kernel of monodromy action of braid group on homology of hyperelliptic curve

3 votes
0 answers
151 views

exact sequence of fundamental groups associated to "almost" smooth families of curves

3 votes
0 answers
108 views

Notation for theta divisors in _Tata Lectures on Theta II_

3 votes
2 answers
322 views

primes of multiplicative reduction for elliptic curves with rational $\ell$-torsion

2 votes
0 answers
154 views

Translations of rings of integers by algebraic integers

1 vote
1 answer
249 views

If $K=\langle$HCF of $\mathbb{Q}_{p}$, $\mathbb{Q}^\mathrm{cycl}\rangle$, does $K$ also contain all roots of elements of $\mathcal{O}_{K}^{\times}$?