The estimation on the inverse elements of strictly diagonallydominant tridiagonal matrix is established; in this estimation, the nonnegative condition of matrix elements is moved.
利用严格对角占优和三对角矩阵的某些特性，推导出严格对角占优三对角矩阵逆元素的统一估计式。
2
In this paper we propose the concept of a weak strictly diagonallydominantmatrix given some DE terminate sufficient conditions for generalized strictly diagonallydominant matrices.
本文提出了弱严格对角占优矩阵的概念，并由此给出了广义严格对角占优矩阵的若干判定条件。
3
The calculation methods of diagonallydominantmatrix in-situ replacement are researched, including the matrix determinant, the matrix equation unknown and the matrix inversion computation.