Geometry-of-numbers methods over global fields II: Coregular representations
Number Theory
2026-04-21 v1
Abstract
We develop geometry-of-numbers methods to count orbits in coregular vector spaces having bounded invariants over any global field. We apply these techniques to bound the average ranks and determine average Selmer group sizes of elliptic curves and Jacobians of hyperelliptic curves over any base global field of characteristic not , or .
Cite
@article{arxiv.2604.16978,
title = {Geometry-of-numbers methods over global fields II: Coregular representations},
author = {Manjul Bhargava and Arul Shankar and Xiaoheng Wang},
journal= {arXiv preprint arXiv:2604.16978},
year = {2026}
}
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39 pages