Classification of irreducible Harish-Chandra modules over the loop-Virasoro algebra

Details Classification of irreducible Harish-Chandra modules over the loop-Virasoro algebra Classification of irreducible Harish-Chandra modules over the loop-Virasoro algebra

2008-01-28

arxiv.org/abs/0801.4217v2

Mathematics

Representation Theory

27

Scientific paper

The loop-Virasoro algebra is the Lie algebra of the tensor product of the Virasoro algebra and the Laurent polynomial algebra. This paper classifies irreducible Harish-Chandra modules over the loop-Virasoro algebra, which turn out to be highest weight modules, lowest weight modules and evaluation modules of the intermediate series (all wight spaces are 1-dimensional). As a by-product, we obtain a classification of irreducible Harish-Chandra modules over truncated Virasoro algebras. We also determine the necessary and sufficient conditions for highest weigh irreducible modules over the loop-Virasoro algebra to have all finite dimensional weight spaces, as well as the necessary and sufficient conditions for highest weigh Verma modules to be irreducible.

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