光线模式矩阵和光线矩阵的定义第一被建议在一般 H 矩阵的 nonsingularity/singularity 和集中上建立一些新结果。然后矩阵 A 上的一些条件 < 啜 class= “ a-plus-plus ” > n
The definitions of θ-ray pattern proposed to establish some new results matrix and θ-ray matrix are firstly on nonsingularity/singularity and convergence of general H-matrices. Then some conditions on the matrix A ∈ C^n×n and nonempty α (n) = {1,2,... ,n} are proposed such that A is an invertible H-matrix if A(α) and A/α are both invertible H-matrices. Furthermore, the important results on Schur complement for general H-matrices are presented to give the different necessary and sufficient conditions for the matrix A E HM and the subset α C (n) such that the Schur complement matrix A/α∈ HI^n-|α| or A/α ∈ Hn-|α|^M or A/α ∈ H^n-| α|^S.