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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