Diagram automorphisms and canonical bases for quantized enveloping algebras

Ying Ma, Toshiaki Shoji, Zhiping Zhou

Let ${\mathbf{U}}_q^{-}$ be the negative part of the quantized enveloping algebra associated to a Kac-Moody algebra $\mathfrak{g}$ of symmetric type, and ${\underline{\mathbf{U}}}_q^{-}$…