Enumerating odd-degree hyperelliptic curves and abelian surfaces over {mathbb {P}}^1

Abstract

Given asymptotic counts in number theory, a question of Venkatesh asks what is the topological nature of lower order terms. We consider the arithmetic aspect of the inertia stack of an algebraic stack over finite fields to partially answer this question. Subsequently, we acquire new sharp enumerations of quasi-admissible odd-degree hyperelliptic curves over {mathbb {F}}_q(t) ordered by discriminant height.