1997/02/21 by C. Dong, H. Li, Dong, C. +3 · 5 citations
Mathematics · #FOS: Mathematics #Quantum Algebra (math.QA) #math.QA #q-alg
paper · pdf · doi:10.48550/arxiv.q-alg/9702027
latex, 9 pages
arxiv created 1997/02/21 · arxiv updated 2009/11/30
Let V be a vertex operator algebra and g an automorphism of order T. We construct a sequence of associative algebras Ag,n(V) with n∈(1)/(T)\Z nonnegative such that Ag,n(V) is a quotient of Ag,n+1/T(V) and a pair of functors between the category of Ag,n(V)-modules which are not Ag,n-1/T(V)-modules and the category of admissible V-modules. These functors exhibit a bijection between the simple modules in each category. We also show that V is g-rational if and only if all Ag,n(V) are finite-dimensional semisimple algebras.