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Vertex representations via finite groups and the McKay correspondence
Given a finite group
and a virtual character
on it, we construct a Fock space and associated vertex operators in terms of a representation ring of wreath products
Sn We recover the character tables of wreath products
Sn by vertex operator calculus. When
is a finite subgroup of SU2, is a finite subgroup of A D E type, which can be regarded as a new form of McKay correspondence.
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