Vertex operator algebra with two Miyamoto involutions generating $S_3$
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In this article we study a VOA with two Miyamoto involutions generating $S_3$. In \cite{M3}, Miyamoto showed that a VOA generated by two conformal vectors whose Miyamoto involutions generate an automorphism group isomorphic to $S_3$ is isomorphic to one of the four candidates he listed. We construct one of them and prove that our VOA is actually the same as $\mathrm{VA}(e,f)$ studied by Miyamoto. We also show that there is an embedding into the moonshine VOA. Using our VOA, we can define the 3A-triality in the Monster.
latex 26pages, new sections on simple current extensions and embedding into the moonshine VOA are added
latex 26pages, new sections on simple current extensions and embedding into the moonshine VOA are added