Mathematics – Quantum Algebra
Scientific paper
2005-03-13
Mathematics
Quantum Algebra
52 pages, no figure
Scientific paper
This paper is a continuation of our paper math.QA/0403010 at which several coset subalgebras of the lattice VOA $V_{\sqrt{2}E_8}$ were constructed and the relationship between such algebras with the famous McKay observation on the extended E_8 diagram and the Monster simple group were discussed. In this article, we shall provide the technical details. We completely determine the structure of the coset subalgebras constructed and show that they are all generated by two conformal vectors of central charge 1/2. We also study the representation theory of these coset subalgebras and show that the product of two Miyamoto involutions is in the desired conjugacy class of the Monster simple group if a coset subalgebra U is actually contained in the Moonshine VOA. The existence of U inside the Moonshine VOA for the cases of 1A, 2A, 2B and 4A is also established. Moreover, the cases for 3A, 5A and 3C are discussed.
Lam Ching Hung
Yamada Hiromichi
Yamauchi Hiroshi
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