On coideal subalgebras of cocentral Kac algebras and a generalization of Wall's conjecture

Published 25 Mar 2012 in math.QA | (1203.5491v1)

Abstract: It shown that any coideal subalgebra of a finite dimensional Hopf algebra is a cyclic module over the dual Hopf algebra. Using this we describe all coideal subalgebras of a cocentral abelian extension of Hopf algebras extending some results from [4].

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Sebastian Burciu

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