Quasi-finite algebras graded by Hamiltonian and vertex operator algebras

Details Quasi-finite algebras graded by Hamiltonian and vertex operator algebras Quasi-finite algebras graded by Hamiltonian and vertex operator algebras

2005-05-04

arxiv.org/abs/math/0505071v1

Mathematics

Quantum Algebra

41 pages

Scientific paper

A general notion of a quasi-finite algebra is introduced as an algebra graded by the set of all integers equipped with topologies on the homogeneous subspaces satisfying certain properties. An analogue of the regular bimodule is introduced and various module categories over quasi-finite algebras are described. When applied to the current algebras (universal enveloping algebras) of vertex operator algebras satisfying Zhu's $C_2$-finiteness condition, our general consideration derives important consequences on representation theory of such vertex operator algebras. In particular, the category of modules over such a vertex operator algebra is shown to be equivalent to the category of modules over a finite-dimensional associative algebra.

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