Mathematics – Category Theory
Scientific paper
2003-01-20
Mathematics
Category Theory
41 pages, PDF file based on MacWrite document This revised version corrects some duality mistakes in the last three sections
Scientific paper
A useful general concept of bialgebroid seems to be resolving itself in recent publications; we give a treatment in terms of modules and enriched categories. We define the term "quantum category". The definition of antipode for a bialgebroid is less resolved in the literature. Our suggestion is that the kind of dualization occurring in Barr's star-autonomous categories is more suitable than autonomy (= compactness = rigidity). This leads to our definition of quantum groupoid intended as a "Hopf algebra with several objects".
Day Brian
Street Ross
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