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Notes on ω- and τ-matrices |
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| Authors: | Daniel Hershkowitz Abraham Berman |
| Institution: | Department of Mathematics Technion—Israel Institute of Technology Haifa 32000, Israel |
| Abstract: | Results on ω- and τ-matrices are surveyed. The question whether an ω-matrix with positive leading principal minors is a τ-matrix is answered negatively. Other open questions are discussed. New conjectures and questions are introduced. |
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