Rationality of vertex operator algebras

Details Rationality of vertex operator algebras Rationality of vertex operator algebras

2006-07-26

arxiv.org/abs/math/0607679v1

Mathematics

Quantum Algebra

33pages

Scientific paper

It is shown that a simple vertex operator algebra V is rational if and only if its Zhu algebra A(V) is semisimple and each irreducible admissible V-module is ordinary. A contravariant form on a Verma type admissible V-module is constructed and the radical is exactly the maximal proper submodule. As an application the rationality of V_L^+ for any positive definite even lattice is obtained.

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