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math.QA2009
Right coideal subalgebras of the Borel part of a quantized enveloping algebra
I. Heckenberger, S. Kolb
For the Borel part of a quantized enveloping algebra we classify all right coideal subalgebras for which the intersection with the coradical is a Hopf algebra. The result is expres…
math.QA2009★ 11 cited
Right coideal subalgebras of Nichols algebras and the Duflo order on the Weyl groupoid
I. Heckenberger, H. -J. Schneider
We study graded right coideal subalgebras of Nichols algebras of semisimple Yetter-Drinfeld modules. Assuming that the Yetter-Drinfeld module admits all reflections and the Nichols…