Abstract
According to V.P. Potapov, a classical interpolation problem can be reformulated in terms of a so-called Fundamental Matrix Inequality (FMI). To show that every solution of the FMI satisfies the interpolation problem, we usually have to transform the FMI in some special way. In this paper a number of the transformations of the FMI which come into play are motivated and demonstrated by simple, but typical examples.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Moscow: Fizmatgiz 1961. English translation: Edinburg and London: Oliver & Boyd 1965.
Hamburger, H., Über eine Erweiterung des Stieltjesschen Momentenproblems. I. (German) Math. Annalen 81: 3 (1920), 235–319.
Ivanchenko, T.S.; Sakhnovich, L.A., An operator approach to V.P. Potapov’s scheme for the investigation of interpolation problems. (Russian), Ukrain. Mat. Zh. 39:5 (1987), 573–578. Engl. translation: Ukrainian Math. J. 39: 5 (1987), 464–469.
Kac, I.S. and M.G. Krein, R-functions — analytic functions mapping the upper half-plane into itself, Supplement I to the Russian transl. of F.V. Atkinson, Discrete and Continuous Boundary Problems, Moscow: Mir 1968, 629–647. English translation: Amer. Math. Soc. Transl. (2), 103, 1973, pp. 1–18, 99–102.
[K1] Katsnelson, V., Continuous analogues of the Hamburger-Nevanlinna theorem and fundamental matrix inequalities for classical problems. III. (Russian) Teoriya Funktsiĭ, Funktsional’nyĭ Analiz i Ikh Prilozheniya
39, (1983), 61–73. English translation: Amer. Math. Soc. Transl. (2) 136 (1987), 85–96.
Katsnelson, V., Continuous analogues of the Hamburger-Nevanlinna theorem and fundamental matrix inequalities for classical problems. IV. (Russian), Teoriya Funktsiĭ, Funktsional’nyĭ Analiz i Ikh Prilozheniya, 40, (1983), 79–90. English translation: Amer. Math. Soc. Transl. (2) 136 (1987), 97–108.
Katsnelson, V., An integral representation of hermitian positive kernels of mixed type and the generalized Nehari problem.I. (Russian), Teoriya Funktsiĭ, Funktsional’nyĭ Analiz i Ikh Prilozheniya, 43, (1985), 54–70. English translation: Journ. of Soviet. Math. 48: 2 (1990), 162–176.
Katsnelson, V., The fundamental matrix inequality of the problem of the decomposition of a positive definite kernel into elementary kernels. (Russian), Deposited in UkrNIINTI. 10.7.1984. No. 1184 Uk Dep.
KKY] Katsnelson, V.; A. Kheifets and P. Yuditskii, An abstract interpolation problem and the extension theory of isometric operators. (Russian), in: Operators in Function Spaces and Problems in Function Theory, Kiev: Naukova Dumka 1987 (V.A. Marchenko — editor), 83–96. English translation — this Volume.
Kovalishina, I.V., Analytic theory of a class of interpolation problems. (Russian), I.vestiya Akad. Nauk SSR Ser. Mat. 47:3 (1983), 455–497. Engl. translation: Math. USSR Izvestiya 22: 3 (1984), 419–463.
Šmul’yan, Yu.L., A Hellinger operator integral. (Russian), Matem. Sbornik 47((91):4 (1959), 381–430. Engl. translation: Amer. Math. Soc. Transl., (2) 22 (1962), 289–337.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1997 Springer Basel AG
About this chapter
Cite this chapter
Katsnelson, V.E. (1997). On transformations of Potapov’s fundamental matrix inequality. In: Dym, H., Katsnelson, V., Fritzsche, B., Kirstein, B. (eds) Topics in Interpolation Theory. Operator Theory Advances and Applications, vol 95. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8944-5_12
Download citation
DOI: https://doi.org/10.1007/978-3-0348-8944-5_12
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-0348-9838-6
Online ISBN: 978-3-0348-8944-5
eBook Packages: Springer Book Archive