2 problems

Let $\tau$ be a preorder of size $n$, and let $\mathbb E_\tau(u,v)$ be the double Ehrhart polynomial counting lattice points of the two-parameter polytope $\mathcal Q_\tau(r,s)$. B…

Ahmed's conjecture. Every $\mathcal{P}\mathcal{T}$-symmetric scattering potential complies with these reciprocity and transmission relations.