Gamma-positivity conjecture for symmetric edge polytopes of type A

Let ${\mathcal A}_G$ be a symmetric edge polytope of type A, and let $h^*({\mathcal A}_G,x)$ denote its $h^*$-polynomial. Type A symmetric edge-polytope conjecture. The $h^*$-polynomial of any symmetric edge polytope of type A is $\gamma$-positive. The conjecture is motivated by the preceding explicit calculations for complete bipartite graphs; its general status is not resolved in the supplied source.