EXTREMAL CASES OF SN-MATRICES

• Journal title : Honam Mathematical Journal
• Volume 30, Issue 4,  2008, pp.659-670
• Publisher : The Honam Mathematical Society
• DOI : 10.5831/HMJ.2008.30.4.659
Title & Authors
EXTREMAL CASES OF SN-MATRICES
Kim, Si-Ju; Choi, Tae-Young;

Abstract
We denote by $\small{\mathcal{Q}}$(A) the set of all real matrices with the same sign pattern as a real matrix A. A matrix A is an SN-matrix provided there exists a set S of sign pattern such that the set of sign patterns of vectors in the -space of $\small{\tilde{A}}$ is S, for each $\small{{\tilde{A}}{\in}\mathcal{Q}(A)}$. Some properties of SN-matrices arc investigated.
Keywords
zero patterns;conformal contractions;signed null-spaces;
Language
English
Cited by
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