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math.RA2009
Corings with decomposition and semiperfect corings
L. El Kaoutit, J. Gómez-Torrecillas
We give a characterization, in terms of Galois infinite comatrix corings, of the corings that decompose as a direct sum of left comodules which are finitely generated as left modul…
math.RA2009
Coinduction functor and simple comodules
L. El Kaoutit, J. Gómez-Torrecillas
Consider a coring with exact rational functor, and a finitely generated and projective right comodule. We construct a functor (\emph{coinduction functor}) which is right adjoint to…