%0 Journal Article
%T Hopf-Galois extensions and an exact sequence for $H$-Picard groups
%A S. Caenepeel
%A A. Marcus
%J Mathematics
%D 2008
%I arXiv
%X Let $H$ be a Hopf algebra, and $A$ an $H$-Galois extension. We investigate $H$-Morita autoequivalences of $A$, introduce the concept of $H$-Picard group, and we establish an exact sequence linking the $H$-Picard group of $A$ and the Picard group of $A^{{\rm co}H}$.
%U http://arxiv.org/abs/0812.1691v2