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math.QA2004
Cup Products in Hopf-Cyclic Cohomology
Masoud Khalkhali, Bahram Rangipour
We construct cup products of two different kinds for Hopf-cyclic cohomology. When the Hopf algebra reduces to the ground field our first cup product reduces to Connes' cup product…
math.QA2004
Stable anti-Yetter-Drinfeld modules
Piotr M. Hajac, Masoud Khalkhali, Bahram Rangipour +1
We define and study a class of entwined modules (stable anti-Yetter-Drinfeld modules) that serve as coefficients for the Hopf-cyclic homology and cohomology. In particular, we expl…