On matrices with non-positive off-diagonal elements and positive principal minors
Miroslav Fiedler, Vlastimil Pták (1962)
Czechoslovak Mathematical Journal
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Miroslav Fiedler, Vlastimil Pták (1962)
Czechoslovak Mathematical Journal
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Miroslav Fiedler, Vlastimil Pták (1966)
Czechoslovak Mathematical Journal
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Miroslav Fiedler (1977)
Mathematica Slovaca
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Miroslav Fiedler, Vlastimil Pták (1969)
Czechoslovak Mathematical Journal
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Raphael Loewy (2012)
Open Mathematics
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Let A be an n×n irreducible nonnegative (elementwise) matrix. Borobia and Moro raised the following question: Suppose that every diagonal of A contains a positive entry. Is A similar to a positive matrix? We give an affirmative answer in the case n = 4.
Li, Hou-Biao, Huang, Ting-Zhu, Li, Hong (2010)
Journal of Inequalities and Applications [electronic only]
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