Geometry-of-numbers methods over global fields II: Coregular representations

Manjul Bhargava; Arul Shankar; Xiaoheng Wang

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arXiv · 2604.16978

Geometry-of-numbers methods over global fields II: Coregular representations

Manjul Bhargava·Arul Shankar·Xiaoheng Wang

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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 $F$ of characteristic not $2$, $3$ or $5$.

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Manjul Bhargava, Arul Shankar, Xiaoheng Wang. 2026-04-18. Geometry-of-numbers methods over global fields II: Coregular representations. https://arxiv.org/abs/2604.16978

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