5 citations · 11 across the 9 of their papers we have counts for
Showing 2023Show all
2 papers · 1 filter
math.NT2023★ 1 cited
On abelian varieties whose torsion is not self-dual
Sarah Frei, Katrina Honigs, John Voight
We construct infinitely many abelian surfaces A defined over the rational numbers such that, for a prime ell <= 7, the ell-torsion subgroup of A is not isomorphic as a Galois modul…
math.AG2023★ 3 cited
A threefold violating a local-to-global principle for rationality
Sarah Frei, Lena Ji
In this note we construct an example of a smooth projective threefold that is irrational over but is rational at all places. Our example is a complete intersection of t…