14,696 research outputs found

    Enveloping algebras of some quantum Lie algebras

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    We define a family of Hopf algebra objects, HH, in the braided category of Zn\mathbb{Z}_n-modules (known as anyonic vector spaces), for which the property ψHβŠ—H2=idHβŠ—H\psi^2_{H\otimes H}=id_{H\otimes H} holds. We will show that these anyonic Hopf algebras are, in fact, the enveloping (Hopf) algebras of particular quantum Lie algebras, also with the property ψ2=id\psi^2=id. Then we compute the braided periodic Hopf cyclic cohomology of these Hopf algebras. For that, we will show the following fact: analogous to the non-super and the super case, the well known relation between the periodic Hopf cyclic cohomology of an enveloping (super) algebra and the (super) Lie algebra homology also holds for these particular quantum Lie algebras, in the category of anyonic vector spaces

    A note on Hopf Cyclic Cohomology in Non-symmetric Monoidal Categories

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    In our previous work, Hopf cyclic cohomology in braided monoidal categories, we extended the formalism of Hopf cyclic cohomology due to Connes and Moscovici and the more general case of Hopf cyclic cohomology with coefficients to the context of abelian braided monoidal categories. In this paper we go one step further in reducing the restriction of the ambient category being symmetric. We let the ambient category to be non-symmetric but assume only the restriction on the braid map for the Hopf algebra object (in that category) which is the main player in the theory. In the case of Hopf cyclic cohomology with (nontrivial) coefficients we also need to have similar restrictions on the braid map for the object(s) providing the coefficients datum. We present a family of examples of non-symmetric categories in which many objects with such a restrictions on the braid map exist (anyonic vector spaces).Comment: The author would like to express his sincere appreciation to Masoud Khalkhali for illuminating discussions and encouragement
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