【摘要】 元素来自于集合{+,-,0}的矩阵A称为符号模式矩阵,简称符号模式.A的符号模式矩阵类定义为符号模式为A的所有实矩阵的集合.本文中,我们考虑n×n的对称符号模式A,其中除了(1,1),(1,2),(2,1),(2,2)元素外,A的前两行和前两列的元素全为正的,其它的非对角元素全为零.本文给出了A(n≥2)的惯量.更多还原

【Abstract】 A sign pattern matrix A is a matrix whose entries are from the set {+,-,0}.The sign pattern matrix class of A is defined by the set of all real matrixes those sign pattern is A.After a research on an n×n symmetric sign pattern A with all the entries on the first two rows and columns being positive except (1,1),(1,2),(2,1),(2,2) entries,and other non-diagonal entries being zero,this paper has presented the inertia of A(n≥2).更多还原