Titlebook: Recent Advances in Operator Theory; The Israel Gohberg A A. Dijksma,M. A. Kaashoek,A. C. M. Ran Conference proceedings 2001 Birkh?user Verl

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Positive Extensions and Diagonally Connected Patterns,The band method with two coupled semi-band structures is used to give complete solutions to positive extension problems with an underlying pattern that is diagonally connected.

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On Some Classes of Extensions of Sectorial Operators and Dual Pairs of Contractions,Some classes of contractive and noncontractive extensions of a dual pair of contractions are investigated. A problem of a description of the set of all .-sectorial extensions of a sectorial operator is solved in terms of its linear-fractional transformation. Some complements to the J. von Neumann inequality is obtained also.

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Operator Theory: Advances and Applicationshttp://image.papertrans.cn/r/image/822919.jpg

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只看該作者 · 發(fā)表于 2025-3-30 02:40:09

On the Spectral Theory of Degenerate Quadratic Operator Pencils, from below and has a compact resolvent. Such pencils naturally arise in stability problems of mechanics and resistive magnetohydrodynamics. Under certain assumptions on . and . the description of the spectrum of the pencil . is given.

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