For a long period the theory of modules over rings on the one hand and comodules and
Hopf modules for coalgebras and bialgebras on the other side developed quite …

In this note we study Morita contexts and Galois extensions for corings. For a coring C
https://s3-euw1-ap-pe-df-pch-content-public-p. s3. eu-west-1. amazonaws …

We characterize the corings whose category of comodules has a generating set of small
projective comodules in terms of the (noncommutative) descent theory. In order to extricate …

We construct comatrix corings on bimodules without finiteness conditions by using firm rings.
This leads to the formulion of a notion of Galois coring which plays a key role in the …

The Chern-Galois theory is developed for corings or coalgebras over noncommutative rings.
First the notion of an entwined extension as an extension of algebras within a bijective …

Galois extensions as functors of comodules Page 1 manuscripta math. 59, 391 397 (1987)
manuscripta mathemati ca @ Springcr-Verlag 1987 GALOIS EXTENSIONS AS FUNCTORS OF …

We study co-Frobenius and more generally Quasi-co-Frobenius corings over arbitrary
baserings and over PF baserings in particular. We generalize some results about (Quasi-) …

Given an A-coring C https://s3-euw1-ap-pe-df-pch-content-public-p. s3. eu-west-1.
amazonaws. com/9780429187629/ac445a68-1635-4dfb-97a7-7653d5efb83a/content …

In this paper we define Yetter-Drinfeld modules over a coquasi-bialgebra and prove that the
category of Yetter. Drinfeld modules is monoidal, pre. braided and coincides with the left …

We study Galois extensions M (co-) H⊂ M for H-(co) module algebras M if H is a Frobenius
Hopf algebroid. The relation between the action and coaction pictures is analogous to that …