10 citations · 10 across the 1 of their papers we have counts for
3 papers
math.RA2003★ 10 cited
On Higher Frobenius-Schur Indicators
Yevgenia Kashina, Yorck Sommerhaeuser, Yongchang Zhu
We study the higher Frobenius-Schur indicators of modules over semisimple Hopf algebras, and relate them to other invariants as the exponent, the order, and the index. We prove var…
math.RA2001
Self-dual modules of semisimple Hopf algebras
Yevgenia Kashina, Yorck Sommerhaeuser, Yongchang Zhu
We prove that, over an algebraically closed field of characteristic zero, a semisimple Hopf algebra that has a nontrivial self-dual simple module must have even dimension. This gen…
math.QA1999
On Hopf algebras with positive bases
J. H. Lu, M. Yan, Y. C. Zhu
We show that if a finite dimensional Hopf algebra over has a basis such that all the structure constants are non-negative, then the Hopf algebra must be given by a finite…