2 problems

Stretching conjecture. The coefficients of each polynomial $f_i$ are all nonnegative.

The paper considers nilpotent representations of $U_q(g)$, where $g$ is a simple Lie algebra, satisfying $(X_i^{\pm})^N=0$ and $(K_i)^N=q^{2Np_i}$ for $p_i\in\mathbf{C}$, with…