Let S be a symmetric operator with defect index (1,1) in a Pontryagin space ℋ. The Krein formula establishes a bijective correspondence between the generalized resolvents of S and the set of Nevanlinna functions as parameters. We give an analogue of the Krein formula in the case that ℋ is a degenerated inner product space. The set of parameters is determined by a kernel condition. These results are applied to some classical interpolation problems with singular data.
机构:
Institute of Mathematics, Academia Sinica, Taipei
National Center for Theoretic Sciences, HsinchuInstitute of Mathematics, Academia Sinica, Taipei
Hsieh M.-L.
Namikawa K.
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Department of Mathematics, School of Engineering, Tokyo Denki University, 5, Asahicho, Senju, Adachi City, 120-8551, TokyoInstitute of Mathematics, Academia Sinica, Taipei
机构:
Departamento de Matemática, Faculdade de Cie. e Tecnologia, Universidade Nova de LisboaDepartamento de Matemática, Faculdade de Cie. e Tecnologia, Universidade Nova de Lisboa
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Department of Mathematics, Jadavpur University, KolkataDepartment of Mathematics, Jadavpur University, Kolkata
Sain D.
Paul K.
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Department of Mathematics, Jadavpur University, KolkataDepartment of Mathematics, Jadavpur University, Kolkata
Paul K.
Debnath L.
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Department of Mathematics, The University of Texas-Pan American, 1201 West University Drive, Edinburg, 78539, TXDepartment of Mathematics, Jadavpur University, Kolkata