Mathematics – Differential Geometry
Scientific paper
2008-09-15
Mathematics
Differential Geometry
This is a slightly revised version of a survey article published in the Proceedings of the International Congress of Chinese M
Scientific paper
The purpose of this article is to present a survey of our recent results on length commensurable and isospectral locally symmetric spaces. The geometric questions led us to the notion of "weak commensurability" of two Zariski-dense subgroups in a semi-simple Lie group. We have shown that for arithmetic subgroups, weak commensurability has surprisingly strong consequences. Our proofs make use of p-adic techniques and results from algebraic and transcendental number theory.
Prasad Gopal
Rapinchuk Andrei S.
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