Doubly alternating words in the positive part of $U_q({\widehat{\mathfrak{sl}}}_2)$

Chenwei Ruan

This paper is about the positive part $U_q^{+}$ of the $q$-deformed enveloping algebra $U_q({\widehat{\mathfrak{sl}}}_2)$. The algebra $U_q^{+}$ admits an embedding, due to Rosso, into a…