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arXiv · 1806.08480

Optimal estimates for an average of Hurwitz class numbers

Shingo Sugiyama·Masao Tsuzuki
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Abstract

In this paper, we give an optimal estimate of an average of Hurwitz class numbers. As an application, we give an equidistribution result of the family $\{\frac{t}{2q^{\nu/2}} \ | \ \nu \in \mathbb{N}, t \in \mathbb{Z}, |t|<2q^{\nu/2}\}$ with $q$ prime, weighted by Hurwitz class numbers. This equidistribution produces many asymptotic relations among Hurwitz class numbers. Our proof relies on the resolvent trace formula of Hecke operators on elliptic cusp forms of weight $k\ge 2$.

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Shingo Sugiyama, Masao Tsuzuki. 2018-06-22. Optimal estimates for an average of Hurwitz class numbers. https://doi.org/10.1007/s11139-019-00146-z

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