The regular representations of GLN over finite local principal ideal rings

Alexander Stasinski, Shaun Stevens

Research output: Contribution to journalArticle

6 Citations (Scopus)
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Abstract

Let o be the ring of integers in a non-Archimedean local field with finite residue field, p its maximal ideal, and r ≥ 2 an integer. An irreducible representation of the finite group Gr = GLN (o/p r ), for an integer N ≥ 2, is called regular if its restriction to the principal congruence kernel Kr−1 = 1 + pr−1 MN (o/pr ) consists of representations whose stabilisers modulo K1 are centralisers of regular elements in MN (o/p). 
The regular representations form the largest class of representations of Gr which is currently amenable to explicit construction. Their study, motivated by constructions of supercuspidal representations, goes back to Shintani, but the general case remained open for a long time. In this paper we give an explicit construction of all the regular representations of Gr.
Original languageEnglish
Pages (from-to)1066–1084
Number of pages29
JournalBulletin of the London Mathematical Society
Volume49
Issue number6
Early online date19 Oct 2017
DOIs
Publication statusPublished - Dec 2017

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