Superstrong approximation
id:
superstrong-approximation-233-18085575
title:
Superstrong approximation
text:
Superstrong approximation is a generalisation of strong approximation in algebraic groups G, to provide spectral gap results. The spectrum in question is that of the Laplacian matrix associated to a family of quotients of a discrete group Γ; and the gap is that between the first and second eigenvalues. Here Γ is a subgroup of the rational points of G, but need not be a lattice: it may be a so-called thin group. The "gap" in question is a lower bound for the difference of those eigenvalues. A con
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wiki
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encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Superstrong_approximation
date created:
date modified:
2024-04-22T05:51:31Z
main entity:
{"identifier":"Q17103817","url":"https://www.wikidata.org/entity/Q17103817"}
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13
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