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arXiv 1002.3422math.NTmath.SP
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PSL(2,R)^d的紧商同余覆盖的一致强谱间隙

A Uniform Strong Spectral Gap for Congruence Covers of a compact quotient of PSL(2,R)^d

Dubi Kelmer

摘要:

半单李群中格的强谱隙的存在性在许多应用中是至关重要的。特别地,对于算术格,在同余覆盖族中具有一致的强谱间隙的界是有用的。当格本身是一个同余群时,从已知的Ramanujan-Selberg拓扑的边界出发,谱隙有一个统一的、非常好的边界。本文建立了不可约余紧格$Γ$在$PSL(2,R)^d$中的同余覆盖的强谱间隙的一致界,其中$d\geq 2$是同余子群性质未知的最简单和最基本的情形.

英文摘要:

The existence of a strong spectral gap for lattices in semi-simple Lie groups is crucial in many applications. In particular, for arithmetic lattices it is useful to have bounds for the strong spectral gap that are uniform in the family of congruence covers. When the lattice is itself a congruence group, there are uniform and very good bounds for the spectral gap coming from the known bounds toward the Ramanujan-Selberg conjectures. In this note, we establish a uniform bound for the strong spectral gap for congruence covers of an irreducible co-compact lattice $Γ$ in $PSL(2,R)^d$ with $d\geq 2$, which is the simplest and most basic case where the congruence subgroup property is not known.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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