On indefinite integral ternary quadratic forms
Number Theory
2026-03-09 v1
Abstract
We resolve two problems pertaining to indefinite integral ternary quadratic forms, one highlighted by Margulis and the other initiated by Serre, both from 1990. To do so we develop tools for dealing with high ramification in problems involving sums over classes of such forms weighted by their diophantine invariants.
Keywords
Cite
@article{arxiv.2603.05849,
title = {On indefinite integral ternary quadratic forms},
author = {Alexander Gamburd and Amit Ghosh and Peter Sarnak and Junho Peter Whang},
journal= {arXiv preprint arXiv:2603.05849},
year = {2026}
}