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A category of modules for the full toroidal Lie algebra

Yuly Billig
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Abstract

We introduce a category B of bounded modules for the toroidal Lie algebras and study irreducible modules in B. We show that one of the irreducible modules in this category, L(T_0), admits a structure of a vertex operator algebra. We prove that L(T_0) factors into a tensor product of a sub-VOA of a hyperbolic lattice VOA and a simple VOA associated with a twisted Virasoro-affine Lie algebra. Every irreducible module in category B is a VOA module for a slightly larger VOA V(T_0). Knowing the structure of V(T_0), we are able to give explicit realizations for all irreducible modules in category B and determine their characters.

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Yuly Billig. 2009-10-13. A category of modules for the full toroidal Lie algebra. https://arxiv.org/abs/math/0509368

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