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Article
Generalized twisted quantum doubles and the McKay correspondence
Journal of Algebra
  • Christopher D. Goff, University of the Pacific
  • Geoffrey Mason, University of California, Santa Cruz
Document Type
Article
Department
Mathematics
DOI
10.1016/j.jalgebra.2010.07.004
Publication Date
12-1-2010
Disciplines
Abstract

We consider a class of quasiHopf algebras which we call generalized twisted quantum doubles. They are abelian extensions H=C[G¯]∗⋈C[G] (G is a finite group, G¯ a homomorphic image, and * denotes the dual algebra), possibly twisted by a 3-cocycle, and are a natural generalization of the twisted quantum double construction of Dijkgraaf, Pasquier and Roche. We show that if G is a subgroup of SU2(C) then H exhibits an orbifold McKay Correspondence: certain fusion rules of H define a graph with connected components indexed by conjugacy classes of G¯, each connected component being an extended affine Diagram of type ADE whose McKay correspondent is the subgroup of G stabilizing an element in the conjugacy class. This reduces to the original McKay Correspondence when G¯=1.

Creative Commons License
Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International
Citation Information
Christopher D. Goff and Geoffrey Mason. "Generalized twisted quantum doubles and the McKay correspondence" Journal of Algebra Vol. 324 Iss. 11 (2010) p. 3007 - 3016 ISSN: 0021-8693
Available at: http://works.bepress.com/chris-goff/31/