一类Z－矩阵的研究

Study of A class or z-Matrix

称Ａ是有性质Ｐ的Ｚ－矩阵．如果Ａ是Ｚ－矩体且Ａ的每个真主子式是正的．该类矩阵包含了几个著名的矩阵类．本文主要刻画了有性质Ｐ的Ｚ－矩阵，改进了［１，４］的结果，并给出了若干著名矩阵类的一些公共特性．

A is said to be a Z-matrix with the property p if A is a Z-matrix and every true minor of A is positive.This class of matrix includes several well-known matrix classes.This paper presents some basic properties of the class of metix and improves the resalts in[ l,4], Furthernore We gives some common poperties of saveal well-known matrix classes.