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math.QA1998
Quantum geometry of algebra factorisations and coalgebra bundles
Tomasz Brzezinski, Shahn Majid
We develop the noncommutative geometry (bundles, connections etc.) associated to algebras that factorise into two subalgebras. An example is the factorisation of matrices $M_2(\C)=…
math.QA1998
Frobenius properties and Maschke-type theorems for entwined modules
Tomasz Brzezinski
Entwined modules arose from the coalgebra-Galois theory. They are a generalisation of unified Doi-Hopf modules. In this paper, Frobenius properties and Maschke-type theorems, known…