3 papers
math.RA2013
Almost involutive Hopf algebras
Andrés Abella, Walter Ferrer Santos
We define the concept of \emph{companion automorphism} of a Hopf algebra as an automorphism : --where denotes the antipode--. A Hopf algebra is…
math.QA2013
Some constructions of compact quantum groups
Andrés Abella, Walter Ferrer Santos, Mariana Haim
The purpose of this paper is to consider some basic constructions in the category of compact quantum groups --for example de case of extensions, of Drinfeld twists, of matched pair…
math.QA2009
Compact coalgebras, compact quantum groups and the positive antipode
A. Abella, W. Ferrer Santos, M. Haim
In this article -that has also the intention to survey some known results in the theory of compact quantum groups using methods different from the standard and with a strong algebr…