Branching rules for level-zero extremal weight modules from $U_q({\widehat{\mathfrak{sl}}}_{n+1})$ to $U_q({\widehat{\mathfrak{sl}}}_n)$

Shutaro Nakaoka

In this paper, we study the structure of a $U_q({\widehat{\mathfrak{sl}}}_n)$-module ${\Psi }_{\epsilon }^{\ast }V(\lambda )$, where $V(\lambda )$ is the extremal weight module of level-zero dominant weigh…