Yetter--Drinfeld structures on Heisenberg doubles and chains

Details Yetter--Drinfeld structures on Heisenberg doubles and chains Yetter--Drinfeld structures on Heisenberg doubles and chains

2009-08-21

arxiv.org/abs/0908.3105v3

Mathematics

Quantum Algebra

17 pages, amsart, times. V3: Multiple braided products are treated more generally and are defined so as to be YD module algebr

Scientific paper

For a Hopf algebra B with bijective antipode, we show that the Heisenberg double H(B^*) is a braided commutative Yetter--Drinfeld module algebra over the Drinfeld double D(B). The braiding structure allows generalizing H(B^*) = B^{*cop}\braid B to "Heisenberg n-tuples" and "chains" ...\braid B^{*cop}\braid B \braid B^{*cop}\braid B\braid..., all of which are Yetter--Drinfeld D(B)-module algebras. For B a particular Taft Hopf algebra at a 2p-th root of unity, the construction is adapted to yield Yetter--Drinfeld module algebras over the 2p^3-dimensional quantum group U_qsl(2).

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