L-R-smash biproducts, double biproducts and a braided category of Yetter-Drinfeld-Long bimodules

Details L-R-smash biproducts, double biproducts and a braided category of Yetter-Drinfeld-Long bimodules L-R-smash biproducts, double biproducts and a braided category of Yetter-Drinfeld-Long bimodules

2008-05-22

arxiv.org/abs/0805.3432v1

Mathematics

Quantum Algebra

9 pages

Scientific paper

Let H be a bialgebra and D an H-bimodule algebra H-bicomodule coalgebra. We find sufficient conditions on D for the L-R-smash product algebra and coalgebra structures on D\otimes H to form a bialgebra (in this case we say that (H, D) is an L-R-admissible pair), called L-R-smash biproduct. The Radford biproduct is a particular case, and so is, up to isomorphism, a double biproduct with trivial pairing. We construct a prebraided monoidal category {\cal LR}(H), whose objects are H-bimodules H-bicomodules M endowed with left-left and right-right Yetter-Drinfeld module as well as left-right and right-left Long module structures over H, with the property that, if (H, D) is an L-R-admissible pair, then D is a bialgebra in {\cal LR}(H).

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