Sign Pattern Matrices that Admit P0 Matrices Year: 2011 Volume: 5 Issue: 12 2060 - 2063 Pages Authors: Ling Zhang Ting-Zhu Huang Abstract: A P0-matrix is a real square matrix all of whose principle minors are nonnegative. In this paper, we consider the class of P0-matrix. Our main aim is to determine which sign pattern matrices are admissible for this class of real matrices. Keywords: Sign pattern matrices P0 matrices graph digraph.