Nonsingularity and -matrices.
Jiří Rohn (1990)
Aplikace matematiky
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New proofs of two previously published theorems relating nonsingularity of interval matrices to -matrices are given.
Jiří Rohn (1990)
Aplikace matematiky
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New proofs of two previously published theorems relating nonsingularity of interval matrices to -matrices are given.
Miroslav Fiedler, Vlastimil Pták (1962)
Czechoslovak Mathematical Journal
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Xiao-Dong Zhang, Chang-Xing Ding (2009)
Czechoslovak Mathematical Journal
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In this paper, necessary and sufficient conditions for equality in the inequalities of Oppenheim and Schur for positive semidefinite matrices are investigated.
Francesco Barioli (1998)
Rendiconti del Seminario Matematico della Università di Padova
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David Carlson, Thomas L. Markham (1979)
Czechoslovak Mathematical Journal
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