Vertex Operator Algebras Associated to Type G Affine Lie Algebras

Details Vertex Operator Algebras Associated to Type G Affine Lie Algebras Vertex Operator Algebras Associated to Type G Affine Lie Algebras

2010-11-15

arxiv.org/abs/1011.3473v1

Mathematics

Representation Theory

30 pages

Scientific paper

In this paper, we study representations of the vertex operator algebra $L(k,0)$ at one-third admissible levels $k= -5/3, -4/3, -2/3$ for the affine algebra of type $G_2^{(1)}$. We first determine singular vectors and then obtain a description of the associative algebra $A(L(k,0))$ using the singular vectors. We then prove that there are only finitely many irreducible $A(L(k,0))$-modules from the category $\mathcal O$. Applying the $A(V)$-theory, we prove that there are only finitely many irreducible weak $L(k,0)$-modules from the category $\mathcal O$ and that such an $L(k,0)$-module is completely reducible. Our result supports the conjecture made by Adamovi{\'c} and Milas in \cite{AM}.

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