On Box-Perfect Graphs

Guoli Ding, Wenan Zang, Qiulan Zhao

Let $G=(V,E)$ be a graph and let $A_G$ be the clique-vertex incidence matrix of $G$. It is well known that $G$ is perfect iff the system $A_{{}_G}\mathbf{x}\le 1$, $\mathbf x\…