Arithmetically defined dense subgroups of Morava stabilizer groups

Naumann, Niko (2008) Arithmetically defined dense subgroups of Morava stabilizer groups. COMPOSITIO MATHEMATICA, 144 (1). pp. 247-270. ISSN 0010-437X,

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Abstract

For every prime p and integer n >= 3 we explicitly construct an abelian variety A/F (n)(p). of dimension n such that for a suitable prime l the group of quasi-isogenies of A/F (n)(p). of l-power degree is canonically a dense subgroup of the nth Morava stabilizer group at p. We also give a variant of this result taking into account a polarization. This is motivated by the recent construction by Behrens and Lawson of topological automorphic forms which generalizes topological modular forms. For this, we prove some arithmetic results of independent interest: a result about approximation of local units in maximal orders of global skew fields which also gives a precise solution to the problem of extending automorphisms of the p-divisible group of a simple abelian variety over a finite field to quasi-isogenies of the abelian variety of degree divisible by as few primes as possible.

Item Type: Article
Uncontrolled Keywords: K(2)-LOCAL SPHERE; PRIME-3; FIELD;
Subjects: 500 Science > 510 Mathematics
Divisions: Mathematics > Prof. Dr. Niko Naumann
Depositing User: Dr. Gernot Deinzer
Date Deposited: 11 Nov 2020 10:45
Last Modified: 11 Nov 2020 10:45
URI: https://pred.uni-regensburg.de/id/eprint/31603

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