Sufficient conditions for positive definiteness of tridiagonal matrices revisited
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We review several sufficient conditions for the positive definiteness of a tridiagonal matrix and propose a different approach to the problem, recalling and comprising little-known results on chain sequences.
KeywordsChain sequences Wall–Wetzel theorem Tridiagonal matrix Positive definite matrix
Mathematics Subject Classification (2000)15A15 15A57 15A45 15A60 15A48
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