Twisted representations of vertex operator algebras

Details Twisted representations of vertex operator algebras Twisted representations of vertex operator algebras

1995-09-06

arxiv.org/abs/q-alg/9509005v1

Mathematics

Quantum Algebra

AMS-Latex, 30 pages

Scientific paper

Let $V$ be a vertex operator algebra and $g$ an automorphism of finite order. We construct an associative algebra $A_g(V)$ and a pair of functors between the category of $A_g(V)$-modules and a certain category of admissible $g$-twisted $V$-modules. In particular, these functors exhibit a bijection between the simple modules in each category. We give various applications, including the fact that the complete reducibility of admissible $g$-twisted modules implies both the finite-dimensionality of homogeneous spaces and the finiteness of the number of simple $g$-twisted modules.

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