On modules associated to coalgebra Galois extensions

Tomasz Brzezinski

For a given entwining structure $(A,C{)}_{\psi }$ involving an algebra $A$, a coalgebra $C$, and an entwining map $\psi :C\otimes A\to A\otimes C$, a category $\M_A^C(ψ)$ of right $(A,C{)}_{\psi }$-m…