Mathematics – Quantum Algebra
Scientific paper
2000-07-26
Duke Math. J. 111 (2002), 51-96
Mathematics
Quantum Algebra
45 pages
Scientific paper
We establish a twisted analog of our recent work on vertex representations and the McKay correspondence. For each finite group $\Gamma$ and a virtual character of $\Gamma$ we construct twisted vertex operators on the Fock space spanned by the super spin characters of the spin wreath products $\Gamma\wr\widetilde{S}_n$ of $\Gamma$ and a double cover of the symmetric group $S_n$ for all $n$. When $\Gamma$ is a subgroup of $SL_2(\mathbb C)$ with the McKay virtual character, our construction gives a group theoretic realization of the basic representations of the twisted affine and twisted toroidal algebras. When $\Gamma$ is an arbitrary finite group and the virtual character is trivial, our vertex operator construction yields the spin character tables for $\Gamma\wr\widetilde{S}_n$.
Frenkel Igor
Jing Naihuan
Wang Weiqiang
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