K0-rings and twisting of finite dimensional semisimple hopf algebras
作者:
Dmitri Nikshych,
期刊:
Communications in Algebra
(Taylor Available online 1998)
卷期:
Volume 26,
issue 1
页码: 321-342
ISSN:0092-7872
年代: 1998
DOI:10.1080/00927879808826132
出版商: Gordon and Breach Science Publishers Ltd.
数据来源: Taylor
摘要:
We show that theK0-group of a finite dimensional semisimple Hopf algebra has a natural structure of a ring with involution and prove that this ring is a twisting invariant of the Hopf algebra.We also study relations between algebraic structure of a Hopf algebra and the one of itsK0ring and prove that the twisting of a finite simple group is a simple Hopf algebra (i.e., it does not have proper normal Hopf subalgebras).In this case the dual Hopf algebra does not have proper Hopf subalgebras.Further, we construct several series of non trivial Hopf algebras by the twisting of the classical series of finite groups and give examples of Hopf algebras which can not be described as twisting of any group.
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