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Classification of irreducible Harish-Chandra modules over full toroidal Lie algebras and higher-dimensional Virasoro algebras (2203.06148v3)

Published 11 Mar 2022 in math.RT

Abstract: In this paper, we completely classify the irreducible Harish-Chandra modules over the full toroidal Lie algebra, which is a natural higher-dimensional analogue of the affine-Virasoro algebra. As a by-product, we also obtain the classification of all possible irreducible Harish-Chandra modules over the higher-dimensional Virasoro algebra, which was introduced by Rao--Moody [Comm. Math. Phys. 1994] These directly generalize the well-known result of O. Mathieu [Invent. Math. 1992] for the classical Virasoro algebra and also the recent work of Billig-Futorny [J. Reine Angew. Math. 2016] for the higher rank Witt algebra. In particular, we show that any irreducible Harish-Chandra module over the higher-dimensional Virasoro algebra turns out to be either a quotient of a module of tensor fields on a torus or a highest weight type module up to a twist of an automorphism, as conjectured by Eswara Rao in 2004.

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