符号模式矩阵理论主要研究矩阵的仅与其符号模式有关的定性性质。符号模式矩阵最早起源于经济学中对某些问题的定性性质的研究。符......

A sign pattern is a matrix whose entries are from the set{+,-,0}.Associated with each sign pattern A of order n is a qua......