Purdue University Graduate School
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Profinite Completions and Representations of Finitely Generated Groups

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posted on 2019-08-16, 14:08 authored by Ryan F SpitlerRyan F Spitler
n previous work, the author and his collaborators developed a relationship in the SL(2,C) representation theories of two finitely generated groups with isomorphicprofinite completions assuming a certain strong representation rigidity for one of thegroups. This was then exploited as one part of producing examples of lattices in SL(2,C) which are profinitely rigid. In this article, the relationship is extended to representations in any connected reductive algebraic groups under a weaker representation rigidity hypothesis. The results are applied to lattices in higher rank Liegroups where we show that for some such groups, including SL(n,Z) forn≥3, they are either profinitely rigid, or they contain a proper Grothendieck subgroup.

History

Degree Type

  • Doctor of Philosophy

Department

  • Mathematics

Campus location

  • West Lafayette

Advisor/Supervisor/Committee Chair

David Ben McReynolds

Additional Committee Member 2

Donu Arapura

Additional Committee Member 3

Deepam Patel

Additional Committee Member 4

Thomas Sinclair

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