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Commutator Hopf subalgebras and irreducible representations

arXiv:math/0507253

Abstract

S. Montgomery and S. Witherspoon proved that upper and lower semisolvable, semisimple, finite dimensional Hopf algebras are of Froebenius type when their dimensions are not divisible by the characteristic of the base field. In this note we show that a finite dimensional, semisimple, lower solvable Hopf algebra is always of Froebenius type, in arbitrary characteristic.

Revised. Examples Added. To appear in Communications in Algebra. 7 pages; AMS-TeX

Commutator Hopf subalgebras and irreducible representations · wovepaper