Group corings
Rings and Algebras
2007-05-23 v1
Abstract
We introduce group corings, and study functors between categories of comodules over group corings, and the relationship to graded modules over graded rings. Galois group corings are defined, and a Structure Theorem for the -comodules over a Galois group coring is given. We study (graded) Morita contexts associated to a group coring. Our theory is applied to group corings associated to a comodule algebra over a Hopf group coalgebra.
Cite
@article{arxiv.math/0701931,
title = {Group corings},
author = {S. Caenepeel and K. Janssen and S. H. Wang},
journal= {arXiv preprint arXiv:math/0701931},
year = {2007}
}
Comments
38 pages