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Breuil–Mézard conjectures for central division algebras

Andrea Dotto

Vol. 19 (2025), No. 2, 213–246
Abstract

We formulate an analogue of the Breuil–Mézard conjecture for the group of units of a central division algebra over a p-adic local field, and we prove that it follows from the conjecture for GL n. To do so we construct a transfer of inertial types and Serre weights between the maximal compact subgroups of these two groups, in terms of Deligne–Lusztig theory, and we prove its compatibility with mod p reduction, via the inertial Jacquet–Langlands correspondence and certain explicit character formulas. We also prove analogous statements for -adic coefficients.

Keywords
Galois deformation theory, smooth representations of $p$-adic groups
Mathematical Subject Classification
Primary: 11S37, 22E50
Milestones
Received: 23 March 2021
Revised: 14 February 2022
Accepted: 11 April 2022
Published: 31 January 2025
Authors
Andrea Dotto
Department of Mathematics
King’s College London
London
United Kingdom

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