September 2023 Near optimal spectral gaps for hyperbolic surfaces
Will Hide, Michael Magee
Author Affiliations +
Ann. of Math. (2) 198(2): 791-824 (September 2023). DOI: 10.4007/annals.2023.198.2.6
Abstract

We prove that if $X$ is a finite area non-compact hyperbolic surface, then for any $\epsilon >0$, with probability tending to one as $n\to \infty$, a uniformly random degree $n$ Riemannian cover of $X$ has no eigenvalues of the Laplacian in $[0,\frac{1}{4}-\epsilon)$ other than those of $X$, and with the same multiplicities.

As a result, using a compactification procedure due to Buser, Burger, and Dodziuk, we settle in the affirmative the question of whether there exists a sequence of closed hyperbolic surfaces with genera tending to infinity and first non-zero eigenvalue of the Laplacian tending to $\frac{1}{4}$.

Copyright © 2023 Department of Mathematics, Princeton University
Will Hide and Michael Magee "Near optimal spectral gaps for hyperbolic surfaces," Annals of Mathematics 198(2), 791-824, (September 2023). https://doi.org/10.4007/annals.2023.198.2.6
Published: September 2023
JOURNAL ARTICLE
34 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

Vol.198 • No. 2 • September 2023
Back to Top