paper

Norton's Trace Formulae for the Griess Algebra of a Vertex Operator Algebra with Larger Symmetry

arXiv:math/0007169 · doi:10.1007/s00220-001-0565-3

Abstract

Formulae expressing the trace of the composition of several (up to five) adjoint actions of elements of the Griess algebra of a vertex operator algebra are derived under certain assumptions on the action of the automorphism group. They coincide, when applied to the moonshine module , with the trace formulae obtained in a different way by S.Norton, and the spectrum of idempotents related to 2A, 2B, 3A and 4A element of the Monster is determined by the representation theory of Virasoro algebra at , algebra at or algebra at . The generalization to the trace function on the whole space is also given for the composition of two adjoint actions, which can be used to compute the McKay-Thompson series for a 2A involution of the Monster.

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