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- W2117839322 abstract "A complex matrix A is ray-nonsingular if det ( X ∘ A ) ≠ 0 for every matrix X with positive entries. A sufficient condition for ray nonsingularity is that the origin is not in the relative interior of the convex hull of the signed transversal products of A . The concept of an isolated set of transversals is defined and used to obtain a necessary condition for A to be ray-nonsingular. Some fundamental similarities as well as differences between ray nonsingularity and sign nonsingularity are illustrated." @default.
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- W2117839322 date "1997-12-01" @default.
- W2117839322 modified "2023-09-29" @default.
- W2117839322 title "Ray patterns of matrices and nonsingularity" @default.
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- W2117839322 doi "https://doi.org/10.1016/s0024-3795(97)80057-2" @default.
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