Finite-dimensional pointed Hopf algebras of type $A_n$ related to the Faddeev-Reshetikhin-Takhtajan $U(R)$ construction

Jacob Towber, Sara Westreich

Two "quantum enveloping algebras", here denoted by $U(R)$ and $U^{\sim }(R)$, are associated in [FRTa] and [FRTb] to any Yang-Baxter operator R. The latter is only a bialgebra, in g…