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Table 3 The experimental verification of \(\pmb{\mbox{I-BSD}_{s}}\)

From: On block diagonal-Schur complements of the block strictly doubly diagonally dominant matrices

i 1 2 3
\(\widehat{t}_{i}-\widehat{s}_{i}\) −8.8985 1,341 1,341
\(\widehat{t}_{i}\widehat{t}_{j}-\widehat{s}_{i}\widehat{s}_{j}\) \( 6.8\times 10^{4} \) 6.8 × 104 1.96 × 106