When is the $q$-multiplicity of a weight a power of $q$?

Pamela E. Harris, Margaret Rahmoeller, Lisa Schneider +1

Berenshtein and Zelevinskii provided an exhaustive list of pairs of weights $(\lambda ,\mu )$ of simple Lie algebras $\mathfrak{g}$ (up to Dynkin diagram isomorphism) for which the multiplic…