A structure theorem for quasi-Hopf comodule algebras
Copyright policy )A structure theorem for quasi-Hopf comodule algebras
If H is a quasi-Hopf algebra and B is a right H-comodule algebra such that there exists v:H\to B a morphism of right H-comodule algebras, we prove that there exists a left H-module algebra A such that B\simeq A# H. The main difference comparing to the Hopf case is that, from the multiplication of B, which is associative, we have to obtain the multiplication of A, which in general is not; for this we use a canonical projection E arising from the fact that B becomes a quasi-Hopf H-bimodule.
9 pages, no figures
- University of Antwerp Belgium
- Romanian Academy Romania
Smash products of general Hopf actions, Mathematics - Quantum Algebra, FOS: Mathematics, smash products, quasi-Hopf algebras, Quantum Algebra (math.QA), right comodule algebras, Hopf algebras (associative rings and algebras)
Smash products of general Hopf actions, Mathematics - Quantum Algebra, FOS: Mathematics, smash products, quasi-Hopf algebras, Quantum Algebra (math.QA), right comodule algebras, Hopf algebras (associative rings and algebras)
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