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Cyclic Homology of Hopf Comodule Algebras and Hopf Module Coalgebras

R. Akbarpour, M. Khalkhali

math.KTarXiv:math/0108126

Abstract

In this paper we construct a cylindrical module A H for an H-comodule algebra A, where the antipode of the Hopf algebra H is bijective. We show that the cyclic module associated to the diagonal of A H is isomorphic with the cyclic module of the crossed product algebra A H. This enables us to derive a spectral sequence for the cyclic homology of the crossed product algebra. We also construct a cocylindrical module for Hopf module coalgebras and establish a similar spectral sequence to compute the cyclic cohomology of crossed product coalgebras.

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