@unpublished{Helbig2025,
  author    = {Helbig, Michael},
  title     = {On the presentation of pointed Hopf algebras},
  doi       = {10.48550/arXiv.1003.5879},
  institution = {Fakult{\"a}t f{\"u}r Angewandte Natur- und Geisteswissenschaften},
  pages     = {1 -- 13},
  year      = {2025},
  abstract  = {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 characters. This class of pointed Hopf algebras has shown great importance in the classification theory and can be seen as generalized quantum groups. As a consequence we get an analog presentation of Nichols algebras of diagonal type.},
  language  = {en}
}