John Voight's user avatar
John Voight's user avatar
John Voight's user avatar
John Voight
  • Member for 14 years
  • Last seen this week
15 votes
Accepted

Which quaternion algebras have class number one?

13 votes

Explicit description of a quaternion algebra with a prescribed set of ramified places

13 votes
Accepted

Representing a number as a sum of four squares and factorization

11 votes
Accepted

Covolumes of unit groups of division algebras

9 votes
Accepted

Explicit isomorphism for quaternion algebras over $\mathbb{Q}$?

8 votes

Ramification of quaternion algebras over $\mathbb Q$

7 votes
Accepted

Solutions to the Diophantine equation $x^2+3y^2+3z^2=n$

6 votes
Accepted

Shimura's construction of an abelian variety from cusp forms of weight $2k$

6 votes

Does anyone have an electronic copy of Waldspurger's "Sur les coefficients de Fourier des formes modulaires de poids demi-entier"?

6 votes

Automorphic quotient for quaternion algebras

6 votes

A note on orders in quaternion algebras

5 votes

How to prove that a quaternion algebra over ℤₚ is isomorphic to Mat₂(ℤₚ) for p prime?

5 votes
Accepted

Norm of maximal order in quaternion algebra

5 votes
Accepted

Left- and right-sided principal ideals of quaternions have same index?

4 votes

Quaternion orders such that every proper ideal is invertible

4 votes
Accepted

Existence of elements in an Eichler order whose norm is minus one

4 votes

Conjugacy in the quaternion group

3 votes

Average of Fourier coefficients of a cusp form of half integral weight

3 votes

An application of Strong Approximation

3 votes

How to compute modular forms of weight one on Shimura curves?

2 votes

Does $S$ being a free rank-$n$ $R$-algebra imply that $S/R$ is free rank $n-1$?

2 votes
Accepted

Factorisation of local quaternionic zeta functions

2 votes
Accepted

Charaterisation of quaternion algebras

1 vote

Quaternions algebras whose class groupoid is actually a class group

1 vote

Involution on false elliptic curve

1 vote

What other lattices are obtainable from this noncommutative ring?

1 vote
Accepted

Integral elements of quaternion algebras with predescribed properties

0 votes

Locally square implies square