Geometry Of Banach Spaces Selected Topics
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Geometry of Banach Spaces Selected Topics
Author | : J. Diestel |
Publsiher | : Springer |
Total Pages | : 298 |
Release | : 2006-11-14 |
Genre | : Mathematics |
ISBN | : 9783540379133 |
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Geometry of Banach Spaces
Author | : Joseph Diestel |
Publsiher | : Unknown |
Total Pages | : 135 |
Release | : 1975 |
Genre | : Banach spaces |
ISBN | : OCLC:260117840 |
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Banach Spaces and Descriptive Set Theory Selected Topics
Author | : Pandelis Dodos |
Publsiher | : Springer |
Total Pages | : 168 |
Release | : 2010-04-15 |
Genre | : Mathematics |
ISBN | : 9783642121531 |
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These notes are devoted to the study of some classical problems in the Geometry of Banach spaces. The novelty lies in the fact that their solution relies heavily on techniques coming from Descriptive Set Theory. Thecentralthemeisuniversalityproblems.Inparticular,thetextprovides an exposition of the methods developed recently in order to treat questions of the following type: (Q) LetC be a class of separable Banach spaces such that every space X in the classC has a certain property, say property (P). When can we ?nd a separable Banach space Y which has property (P) and contains an isomorphic copy of every member ofC? We will consider quite classical properties of Banach spaces, such as “- ing re?exive,” “having separable dual,” “not containing an isomorphic copy of c ,” “being non-universal,” etc. 0 It turns out that a positive answer to problem (Q), for any of the above mentioned properties, is possible if (and essentially only if) the classC is “simple.” The “simplicity” ofC is measured in set theoretic terms. Precisely, if the classC is analytic in a natural “coding” of separable Banach spaces, then we can indeed ?nd a separable space Y which is universal for the class C and satis?es the requirements imposed above.
Open Problems in the Geometry and Analysis of Banach Spaces
Author | : Antonio J. Guirao,Vicente Montesinos,Václav Zizler |
Publsiher | : Springer |
Total Pages | : 169 |
Release | : 2016-07-26 |
Genre | : Mathematics |
ISBN | : 9783319335728 |
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This is an collection of some easily-formulated problems that remain open in the study of the geometry and analysis of Banach spaces. Assuming the reader has a working familiarity with the basic results of Banach space theory, the authors focus on concepts of basic linear geometry, convexity, approximation, optimization, differentiability, renormings, weak compact generating, Schauder bases and biorthogonal systems, fixed points, topology and nonlinear geometry. The main purpose of this work is to help in convincing young researchers in Functional Analysis that the theory of Banach spaces is a fertile field of research, full of interesting open problems. Inside the Banach space area, the text should help expose young researchers to the depth and breadth of the work that remains, and to provide the perspective necessary to choose a direction for further study. Some of the problems are longstanding open problems, some are recent, some are more important and some are only local problems. Some would require new ideas, some may be resolved with only a subtle combination of known facts. Regardless of their origin or longevity, each of these problems documents the need for further research in this area.
Geometric Properties of Banach Spaces and Nonlinear Iterations
Author | : Charles Chidume |
Publsiher | : Springer Science & Business Media |
Total Pages | : 337 |
Release | : 2009-03-27 |
Genre | : Mathematics |
ISBN | : 9781848821897 |
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The contents of this monograph fall within the general area of nonlinear functional analysis and applications. We focus on an important topic within this area: geometric properties of Banach spaces and nonlinear iterations, a topic of intensive research e?orts, especially within the past 30 years, or so. In this theory, some geometric properties of Banach spaces play a crucial role. In the ?rst part of the monograph, we expose these geometric properties most of which are well known. As is well known, among all in?nite dim- sional Banach spaces, Hilbert spaces have the nicest geometric properties. The availability of the inner product, the fact that the proximity map or nearest point map of a real Hilbert space H onto a closed convex subset K of H is Lipschitzian with constant 1, and the following two identities 2 2 2 ||x+y|| =||x|| +2 x,y +||y|| , (?) 2 2 2 2 ||?x+(1??)y|| = ?||x|| +(1??)||y|| ??(1??)||x?y|| , (??) which hold for all x,y? H, are some of the geometric properties that char- terize inner product spaces and also make certain problems posed in Hilbert spaces more manageable than those in general Banach spaces. However, as has been rightly observed by M. Hazewinkel, “... many, and probably most, mathematical objects and models do not naturally live in Hilbert spaces”. Consequently,toextendsomeoftheHilbertspacetechniquestomoregeneral Banach spaces, analogues of the identities (?) and (??) have to be developed.
Elements of Geometry of Balls in Banach Spaces
Author | : Kazimierz Goebel,Stanislaw Prus |
Publsiher | : Oxford University Press |
Total Pages | : 256 |
Release | : 2018-09-06 |
Genre | : Mathematics |
ISBN | : 9780192562326 |
Download Elements of Geometry of Balls in Banach Spaces Book in PDF, Epub and Kindle
One of the subjects of functional analysis is classification of Banach spaces depending on various properties of the unit ball. The need of such considerations comes from a number of applications to problems of mathematical analysis. The list of subjects includes: differential calculus in normed spaces, approximation theory, weak topologies and reflexivity, general theory of convexity and convex functions, metric fixed point theory and others. The book presents basic facts from this field.
Topics in Banach Space Theory
Author | : Fernando Albiac,Nigel J. Kalton |
Publsiher | : Springer |
Total Pages | : 508 |
Release | : 2016-07-19 |
Genre | : Mathematics |
ISBN | : 9783319315577 |
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This text provides the reader with the necessary technical tools and background to reach the frontiers of research without the introduction of too many extraneous concepts. Detailed and accessible proofs are included, as are a variety of exercises and problems. The two new chapters in this second edition are devoted to two topics of much current interest amongst functional analysts: Greedy approximation with respect to bases in Banach spaces and nonlinear geometry of Banach spaces. This new material is intended to present these two directions of research for their intrinsic importance within Banach space theory, and to motivate graduate students interested in learning more about them. This textbook assumes only a basic knowledge of functional analysis, giving the reader a self-contained overview of the ideas and techniques in the development of modern Banach space theory. Special emphasis is placed on the study of the classical Lebesgue spaces Lp (and their sequence space analogues) and spaces of continuous functions. The authors also stress the use of bases and basic sequences techniques as a tool for understanding the isomorphic structure of Banach spaces. From the reviews of the First Edition: "The authors of the book...succeeded admirably in creating a very helpful text, which contains essential topics with optimal proofs, while being reader friendly... It is also written in a lively manner, and its involved mathematical proofs are elucidated and illustrated by motivations, explanations and occasional historical comments... I strongly recommend to every graduate student who wants to get acquainted with this exciting part of functional analysis the instructive and pleasant reading of this book..."—Gilles Godefroy, Mathematical Reviews
Introduction to Banach Spaces and their Geometry
Author | : Anonim |
Publsiher | : Elsevier |
Total Pages | : 307 |
Release | : 2011-10-10 |
Genre | : Mathematics |
ISBN | : 0080871798 |
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Introduction to Banach Spaces and their Geometry