The full text of this article is unavailable through your IP address: 3.138.120.112
Contents Online
Asian Journal of Mathematics
Volume 25 (2021)
Number 3
Harish–Chandra modules over invariant subalgebras in a skew-group ring
Pages: 431 – 454
DOI: https://dx.doi.org/10.4310/AJM.2021.v25.n3.a6
Authors
Abstract
We construct a new class of algebras resembling enveloping algebras and generalizing orthogonal Gelfand–Zeitlin algebras and rational Galois algebras studied by [EMV, FGRZ, RZ, Har]. The algebras are defined via a geometric realization in terms of sheaves of functions invariant under an action of a finite group. A natural class of modules over these algebra can be constructed via a similar geometric realization. In the special case of a local reflection group, these modules are shown to have an explicit basis, generalizing similar results for orthogonal Gelfand–Zeitlin algebras from [EMV] and for rational Galois algebras from [FGRZ]. We also construct a family of canonical simple Harish–Chandra modules and give sufficient conditions for simplicity of some modules.
Keywords
Gelfand–Zeitlin modules, invariant polynomial, Gelfand–Zeitlin algebras, rational Galois algebras, Harish–Chandra modules
2010 Mathematics Subject Classification
14M10, 16W70, 17B35
Received 21 June 2019
Accepted 6 October 2020
Published 14 March 2022