Pointed Hopf algebras with standard braiding are generated in degree one

Abstract

We show that any finite-dimensional pointed Hopf algebra over an abelian group $\Gamma$ such that its infinitesimal braiding is of standard type is generated by group-like and skew-primitive elements. This fact agrees with the long-standing conjecture by Andruskiewitsch and Schneider. We also show that the quantum Serre relations hold in any coradically graded pointed Hopf algebra over $\Gamma$ of finite dimension and determine how these relations are lifted in the standard case.

15 pages