Titlebook: Contributions to Operator Theory in Spaces with an Indefinite Metric; The Heinz Langer Ann Aalt Dijksma,Israel Gohberg,Reinhard Mennicken B

Rotator-Cuff

,Some interpolation problems of Nevanlinna-Pick type. The Kre?n-Langer method,The method of M.G. Kre?nn and H. Langer to solve interpolation problems of Nevanlinna-Pick type is explored. The classical Nevanlinna-Pick problem and a version involving derivatives are treated. The data give rise to an indefinite inner product space and a symmetric operator in it. In general, the inner product space is degenerate.

外形

,Some characteristics of a linear manifold in a Kre?n space and their applications,We introduce two characteristics ε±(.) of a linear manifold . in a Kre?n space and give two applications, one in the geometry of Kre?nn spaces and the other one in the theory of operators in these spaces.

緊張過(guò)度

,Riggings and relatively form bounded perturbations of nonnegative operators in Kre?n spaces,For nonnegative operators in Kre?nn spaces we give conditions for the preservation of the nonemptiness of the resolvent set and the preservation of the regularity of critical points under relatively form bounded perturbations.

MURKY

Norm bounds for Volterra integral operators and time-varying linear systems with finite horizon,Norm bounds are given for Volterra integral operators that appear as input-output operators of finite-dimensional time-varying linear systems on a finite interval. As an application a known result on state feedback ..-control for such systems is derived.

急急忙忙

Spectral properties of a matrix polynomial connected with a component of its numerical range,We prove that any bounded component of the numerical range of a matrix polynomial .(λ) contains at least one eigenvalue of .(λ). Moreover, the set of corresponding Jordan chains is complete.

觀點(diǎn)

消息靈通

On the number of negative squares of certain functions,The aim of the present paper is to compute the number of negative squares of certain functions, especially of some polynomials of several variables.

收藏品

Operator Theory: Advances and Applicationshttp://image.papertrans.cn/c/image/237201.jpg

改良

https://doi.org/10.1007/978-3-0348-8812-7Finite; Operator theory; differential equation; equation; partial differential equation

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