Taschenbuch. Etat : Neu. Druck auf Anfrage Neuware - Printed after ordering - A condensing (or densifying) operator is a mapping under which the image of any set is in a certain sense more compact than the set itself. The degree of noncompactness of a set is measured by means of functions called measures of noncompactness. The contractive maps and the compact maps [i.e., in this Introduction, the maps that send any bounded set into a relatively compact one; in the main text the term 'compact' will be reserved for the operators that, in addition to having this property, are continuous, i.e., in the authors' terminology, for the completely continuous operators] are condensing. For contractive maps one can take as measure of noncompactness the diameter of a set, while for compact maps can take the indicator function of a family of non-relatively com pact sets. The operators of the form F( x) = G( x, x), where G is contractive in the first argument and compact in the second, are also condensing with respect to some natural measures of noncompactness. The linear condensing operators are characterized by the fact that almost all of their spectrum is included in a disc of radius smaller than one. The examples given above show that condensing operators are a sufficiently typical phenomenon in various applications of functional analysis, for example, in the theory of differential and integral equations. As is turns out, the condensing operators have properties similar to the compact ones. N� de r�f. du vendeur 9783034857291

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Measures of Noncompactness and Condensing Operators

Akhmerov

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ISBN 10 : 3034857292 ISBN 13 : 9783034857291

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Measures of Noncompactness and Condensing Operators (Operator Theory: Advances and Applications)

Akhmerov

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Paperback. Etat : Brand New. 264 pages. 9.70x6.70x0.60 inches. In Stock. N� de r�f. du vendeur x-3034857292

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Measures of Noncompactness and Condensing Operators

Akhmerov|Kamenskii|Potapov|Rodkina|Sadovskii

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ISBN 10 : 3034857292 ISBN 13 : 9783034857291

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Etat : New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. A condensing (or densifying) operator is a mapping under which the image of any set is in a certain sense more compact than the set itself. The degree of noncompactness of a set is measured by means of functions called measures of noncompactness. The contra. N� de r�f. du vendeur 4318622

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Measures of Noncompactness and Condensing Operators

Akhmerov

Edit� par Springer, Basel, Birkh�user Basel, Birkh�user Aug 2014, 2014

ISBN 10 : 3034857292 ISBN 13 : 9783034857291

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Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -A condensing (or densifying) operator is a mapping under which the image of any set is in a certain sense more compact than the set itself. The degree of noncompactness of a set is measured by means of functions called measures of noncompactness. The contractive maps and the compact maps [i.e., in this Introduction, the maps that send any bounded set into a relatively compact one; in the main text the term 'compact' will be reserved for the operators that, in addition to having this property, are continuous, i.e., in the authors' terminology, for the completely continuous operators] are condensing. For contractive maps one can take as measure of noncompactness the diameter of a set, while for compact maps can take the indicator function of a family of non-relatively com pact sets. The operators of the form F( x) = G( x, x), where G is contractive in the first argument and compact in the second, are also condensing with respect to some natural measures of noncompactness. The linear condensing operators are characterized by the fact that almost all of their spectrum is included in a disc of radius smaller than one. The examples given above show that condensing operators are a sufficiently typical phenomenon in various applications of functional analysis, for example, in the theory of differential and integral equations. As is turns out, the condensing operators have properties similar to the compact ones. 252 pp. Englisch. N� de r�f. du vendeur 9783034857291

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