A functional model for the tensor product of level 1 highest and level -1 lowest modules for the quantum affine algebra U_q(sl_{2}^)

B. Feigin, M. Jimbo, M. Kashiwara +3

Let $V({\Lambda }_i)$ (resp., $V(-{\Lambda }_j)$) be a fundamental integrable highest (resp., lowest) weight module of $U_q({\widehat{sl}}_2)$. The tensor product $V({\Lambda }_i)\otimes V(-{\Lambda }_j)$ is filtered by…