Li, Min et Wang, Xiu Ling, Derivations and automorphisms of the positive part of the two-parameter quantum group U r,s (B 3), Acta mathematica Sinica. English series (Print) , 33(2), 2017, pp. 235-251
We compute the derivations of the positive part of the two-parameter quantum group U r,s (B 3) and show that the Hochschild cohomology group of degree 1 of this algebra is a three-dimensional vector space over the base field C. We also compute the groups of (Hopf) algebra automorphisms of the augmented two-parameter quantized enveloping algebra . r,s .0(B 3).