Coactions of Hopf Algebras
Received:April 29, 1996  Revised:April 16, 1998
Key Words: Hopf algebra   comodule algebra   morita context.  
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Author NameAffiliation
Hao Rongxia Dept. of Math.
Northern Jiaotong University
Beijing 100044 
Chen Jianai Dept. of Math.
Capital Normal University
Beijing 100037 
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      For a given comodule algebra A over a Hopf algebra H , it is well known that there exists a Morita context based on the smash product A#H*rat of A and H and the coinvariat subalgebra AcoH. We show in this paper that the result still holds for arbitrary H .
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