Mathematics – Rings and Algebras
Scientific paper
2002-06-19
Mathematics
Rings and Algebras
27 pages
Scientific paper
Using the theory of corings, we generalize and unify Morita contexts
introduced by Chase and Sweedler, Doi, and Cohen, Fischman and Montgomery. We
discuss when the contexts are strict. We apply our theory corings arising from
entwining structures, and this leads us to the notion of cleft entwining
structure.
Caenepeel Stefaan
Vercruysse Joost
Wang Shuanhong
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