Titlebook: Operator Extensions, Interpolation of Functions and Related Topics; 14th International C A. Gheondea,D. Timotin,F.-H. Vasilescu Book 1993 S

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,A Method for Constructing Invariant Subspaces for Some Operators on Kre?n Spaces,, subspaces for a class of operators on Kre?n spaces known as weakly definitizable operators. This includes, among others, the definitizable selfadjoint and definitizable unitary operators. A simple proof of the existence of an orthogonal pair of maximal definite invariant subspaces for positive ope

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Antitonicity of the Inverse and J-Contractivity, of positive invertible operators, i.e., given two such operators . and ., (?). ≤ . ? .. ≥ ... In this paper recent work by Shmul’yan [.] and the authors [.] on the extension of (?) to the case of selfadjoint invertible . and . is reviewed. Some of the results in [.] and [.] are here given different

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The Kobayashi Distance between two Contractions,define the Kobayashi pseudodistance on the closed unit ball .. of .(.), where .(.) is the algebra of all bounded linear operators on the Hubert space .. The main result of the paper asserts the fact the Kobayashi pseudodistance is a true distance on the . of ... Some connections between Pick conditi

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The Category of Quotient Bornological Spaces,how I arrived in spaces with a boundedness, then in quotient spaces..Exactness is important in algebra. In Functional Analysis, we use exactness. I describe an abelian category . which contains the category . of b-spaces and linear bounded mappings. Its objects are couples ..∣... Morphisms should be

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