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math.QA2008
When weak Hopf algebras are Frobenius
Miodrag C. Iovanov, Lars Kadison
We investigate when a weak Hopf algebra H is Frobenius; we show this is not always true, but it is true if the semisimple base algebra A has all its matrix blocks of the same dimen…
math.QA2008★ 7 cited
Semisimple Hopf algebras and their depth two Hopf subalgebras
Lars Kadison
We prove that a depth two Hopf subalgebra K of a semisimple Hopf algebra H is normal (where the ground field is algebraically closed of characteristic zero). This means on the…