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Twisted invariant theory for reflection groups

Cédric Bonnafé, Gus Lehrer, Jean Michel

math.GRarXiv:math/0505087

Abstract

Let G be a reflection group acting on a vector space V and let γ be an automorphism of V normalising G. We study how γ acts on invariants and covariants (for various representations) of G, and properties of its eigenspaces.

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