5 citations · 5 across the 2 of their papers we have counts for
3 papers
math.QA2010★ 5 cited
A PBW basis criterion for pointed Hopf algebras
Michael Helbig
We give a necessary and sufficient PBW basis criterion for Hopf algebras generated by skew-primitive elements and abelian group of group-like elements with action given via charact…
math.QA2010
On the lifting of Nichols algebras
Michael Helbig
Nichols algebras are a fundamental building block of pointed Hopf algebras. Part of the classification program of finite-dimensional pointed Hopf algebras with the lifting method o…
math.QA2010
On the presentation of pointed Hopf algebras
Michael Helbig
We give a presentation in terms of generators and relations of Hopf algebras generated by skew-primitive elements and abelian group of group-like elements with action given via cha…