Partial Entwining Structures

  title={Partial Entwining Structures},
  author={Stefaan Caenepeel and K. Janssen},
We introduce partial (co)actions of a Hopf algebra on an algebra A. To this end, we introduce first the notion of lax coring, generalizing Wisbauer's notion of weak coring. We also have the dual notion of lax ring. We then introduce partial and lax entwining structures. Several duality results are given, and we develop Galois theory for partial entwining… CONTINUE READING