Pairs of functions with indefinite Pick
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V Bolotnikov; A Kheifets; L Rodman
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Article
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2003
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Elsevier Science
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English
β 179 KB
Results of factorization type are proved that characterize pairs of functions whose Pick matrices have not more than a prescribed number of negative eigenvalues. These results are in turn used to describe functions having CarathΓ©odory matrices with bounded number of negative eigenvalues.