Abstract
In this paper we introduce generalizations of diagonal crossed products, two-sided crossed products and two-sided smash products, for a quasi-Hopf algebra H. The results we obtain may then be applied to H *-Hopf bimodules and generalized Yetter-Drinfeld modules. The generality of our situation entails that the “generating matrix” formalism cannot be used, forcing us to use a different approach. This pays off because as an application we obtain an easy conceptual proof of an important but very technical result of Hausser and Nill concerning iterated two-sided crossed products.
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Communicated by A. Connes
Research partially supported by the EC programme LIEGRITS, RTN 2003, 505078, and by the bilateral projects “Hopf Algebras in Algebra, Topology, Geometry and Physics” and “New techniques in Hopf algebras and graded ring theory” of the Flemish and Romanian Ministries of Research. The first two authors have been also partially supported by the programme CERES of the Romanian Ministry of Education and Research, contract no. 4-147/2004.
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Bulacu, D., Panaite, F. & Van Oystaeyen, F. Generalized Diagonal Crossed Products and Smash Products for Quasi-Hopf Algebras. Applications. Commun. Math. Phys. 266, 355–399 (2006). https://doi.org/10.1007/s00220-006-0051-z
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DOI: https://doi.org/10.1007/s00220-006-0051-z