Generalizations of Hankel operators
Peetre, Jaak
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Peetre, Jaak
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Bultheel, Adhemar, Van Barel, Marc (1994)
Bulletin of the Belgian Mathematical Society - Simon Stevin
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Douglas Clark (1982)
Banach Center Publications
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Lavon Page (1982)
Banach Center Publications
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Svante Janson, Jaak Peetre, Richard Rochberg (1987)
Revista Matemática Iberoamericana
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Harry Dym (2001)
International Journal of Applied Mathematics and Computer Science
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The purpose of this paper is to exhibit a connection between the Hermitian solutions of matrix Riccati equations and a class of finite dimensional reproducing kernel Krein spaces. This connection is then exploited to obtain minimal factorizations of rational matrix valued functions that are J-unitary on the imaginary axis in a natural way.
Carmen H. Mancera, Pedro José Paúl (2001)
Czechoslovak Mathematical Journal
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In 1997 Pták defined generalized Hankel operators as follows: Given two contractions and , an operator is said to be a generalized Hankel operator if and satisfies a boundedness condition that depends on the unitary parts of the minimal isometric dilations of and . This approach, call it (P), contrasts with a previous one developed by Pták and Vrbová in 1988, call it (PV), based on the existence of a previously defined generalized Toeplitz operator. There seemed to be a strong...