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On Matrices with Signed Null Spaces

Kim, S. J.
Shader, Bryan L.
Hwang, S. G.
Abstract
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We denote by Q(A) the set of all matrices with the same sign pattern as A. A matrix A has signed null-space provided there exists a set S of sign patterns such that the set of sign patterns of vectors in the null-space of à is S for each à is an element of Q(A). Some properties of matrices with signed null-spaces are investigated.
Date
2002-12-19
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Publisher
University of Wyoming. Libraries
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Keywords
totally L-matrices , signed compounds , signed null-spaces , Mathematics
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