On diagonal-Schur complements of block diagonally dominant matrices
The authors discuss some properties of diagonal-Schur complements of block diagonally dominant matrices and prove that the diagonal-Schur complements of block strictly diagonally dominant matrices are block strictly diagonally dominant matrices, and the same holds for generalized block strictly diagonally dominant matrices. Several numerical examples are provided.
block strictly diagonally dominant matrix
scientific article; zbMATH DE number 5710876