Large Genus Asymptotics for Volumes of Strata of Abelian Differentials

TL;DR

This paper establishes the large genus asymptotics for Masur-Veech volumes of strata of Abelian differentials, confirming a prediction and generalizing recent special case results through combinatorial analysis.

Contribution

It provides a general asymptotic formula for volumes of strata of Abelian differentials in large genus, extending previous specific case results.

Findings

Volume asymptotics: b1 4 times the product of (m_i + 1)^{-1}

Confirmed prediction of Eskin-Zorich

Extended results to arbitrary strata, not just special cases

Abstract

In this paper we consider the large genus asymptotics for Masur-Veech volumes of arbitrary strata of Abelian differentials. Through a combinatorial analysis of an algorithm proposed in 2002 by Eskin-Okounkov to exactly evaluate these quantities, we show that the volume $\nu_1 \big( \mathcal{H}_1 (m) \big)$ of a stratum indexed by a partition $m = (m_1, m_2, \ldots , m_n)$ is $\big( 4 + o(1) \big) \prod_{i = 1}^n (m_i + 1)^{-1}$ as $2g - 2 = \sum_{i = 1}^n m_i$ tends to $\infty$. This confirms a prediction of Eskin-Zorich and generalizes some of the recent results of Chen-Moeller-Zagier and Sauvaget, who established these limiting statements in the special cases $m = 1^{2g - 2}$ and $m = (2g - 2)$, respectively. We also include an Appendix by Anton Zorich that uses our main result to deduce the large genus asymptotics for Siegel-Veech constants that count certain types of saddle connections.