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本文引入线性系统分析中不定矩阵的拓展伴随有向图。仅求出拓展伴随有向图的全部有向树,便同时得到了不定矩阵的一阶和二阶代数余子式,避免了通常求二阶代数余子式需找有向2树的运算,使不定矩阵的拓扑计算更易于计算机程序化。
In this paper, the extension of indefinite matrix in linear system analysis is introduced with the directed graph. Only all the directed trees which extend the adjoint digraphs are obtained and the first and second order algebraic subspaces of the indefinite matrix are obtained at the same time. The topological calculation of matrix is easier to computerize.