
Nonstandard Methods in Functional Analysis : Lectures and Notes.
Title:
Nonstandard Methods in Functional Analysis : Lectures and Notes.
Author:
Ng, Siu-Ah.
ISBN:
9789814287555
Personal Author:
Physical Description:
1 online resource (339 pages)
Contents:
Contents -- Preface -- Convention and Symbols -- List of Theorems -- 1. Nonstandard Analysis -- 1.1 Sets and Logic -- 1.1.1 Naive sets, first order formulas and ZFC -- 1.1.2 First order theory and consistency -- 1.1.3 Infinities, ordinals, cardinals and AC -- 1.1.4 Notes and exercises -- Exercises -- 1.2 The Nonstandard Universe -- 1.2.1 Elementary extensions and saturation -- 1.2.2 Superstructure, internal and external sets -- 1.2.3 Two principles -- 1.2.4 Internal extensions -- 1.2.5 Notes and exercises -- Exercises -- 1.3 The Ultraproduct Construction -- 1.3.1 Notes and exercises -- Exercises -- 1.4 Application: Elementary Calculus -- 1.4.1 Infinite, infinitesimals and the standard part -- 1.4.2 Overspill, underspill and limits -- 1.4.3 Infinitesimals and continuity -- 1.4.4 Notes and exercises -- Exercises -- 1.5 Application: Measure Theory -- 1.5.1 Classical measures -- 1.5.2 Internal measures and Loeb measures -- 1.5.3 Lebesgue measure, probability and liftings -- 1.5.4 Measure algebras and Kelley's Theorem -- 1.5.5 Notes and exercises -- Exercises -- 1.6 Application: Topology -- 1.6.1 Monads and topologies -- 1.6.2 Monads and separation axioms -- 1.6.3 Standard part and continuity -- 1.6.4 Robinson's characterization of compactness -- 1.6.5 The Baire Category Theorem -- 1.6.6 Stone- Cech compactification -- 1.6.7 Notes and exercises -- Exercises -- 2. Banach Spaces -- 2.1 Norms and Nonstandard Hulls -- 2.1.1 Seminormed linear spaces and quotients -- 2.1.2 Internal spaces and nonstandard hulls -- 2.1.3 Finite dimensional Banach spaces -- 2.1.4 Examples of Banach spaces -- 2.1.5 Notes and exercises -- Exercises -- 2.2 Linear Operators and Open Mappings -- 2.2.1 Bounded linear operators and dual spaces -- 2.2.2 Open mappings -- 2.2.3 Uniform boundedness -- 2.2.4 Notes and exercises -- Exercises.
2.3 Helly's Theorem and the Hahn-Banach Theorem -- 2.3.1 Norming and Helly's Theorem -- 2.3.2 The Hahn-Banach Theorem -- 2.3.3 The Hahn-Banach Separation Theorem -- 2.3.4 Notes and exercises -- Exercises -- 2.4 General Nonstandard Hulls and Biduals -- 2.4.1 Nonstandard hulls by internal seminorms -- 2.4.2 Weak nonstandard hulls and biduals -- 2.4.3 Applications of weak nonstandard hulls -- 2.4.4 Weak compactness and separation -- 2.4.5 Weak* topology and Alaoglu's Theorem -- 2.4.6 Notes and exercises -- Exercises -- 2.5 Reexive Spaces -- 2.5.1 Weak compactness and reflexivity -- 2.5.2 The Eberlein-Smulian Theorem -- 2.5.3 James' characterization of reflexivity -- 2.5.4 Finite representability and superreflexivity -- 2.5.5 Notes and exercises -- Exercises -- 2.6 Hilbert Spaces -- 2.6.1 Basic properties -- 2.6.2 Examples -- 2.6.3 Notes and exercises -- Exercises -- 2.7 Miscellaneous Topics -- 2.7.1 Compact operators -- 2.7.2 The Krein-Milman Theorem -- 2.7.3 Schauder bases -- 2.7.4 Schauder's Fixed Point Theorem -- 2.7.5 Notes and exercises -- Exercises -- 3. Banach Algebras -- 3.1 Normed Algebras and Nonstandard Hulls -- 3.1.1 Examples and basic properties -- 3.1.2 Spectra -- 3.1.3 Nonstandard hulls -- 3.1.4 Notes and exercises -- Exercises -- 3.2 C*-Algebras -- 3.2.1 Examples and basic properties -- 3.2.2 The Gelfand transform -- 3.2.3 The GNS construction -- 3.2.4 Notes and exercises -- Exercises -- 3.3 The Nonstandard Hull of a C*-Algebra -- 3.3.1 Basic properties -- 3.3.2 Notes and exercises -- Exercises -- 3.4 Von Neumann Algebras -- 3.4.1 Operator topologies and the bicommutant -- 3.4.2 Nonstandard hulls vs. von Neumann algebras -- 3.4.3 Weak nonstandard hulls and biduals -- 3.4.4 Notes and exercises -- Exercises -- 3.5 Some Applications of Projections -- 3.5.1 Infinite C*-algebras -- 3.5.2 P*-algebras -- 3.5.3 Notes and exercises -- Exercises.
4. Selected Research Topics -- 4.1 Hilbert space-valued integrals -- 4.2 Reflexivity and fixed points -- 4.3 Arens product on a bidual -- 4.4 Noncommutative Loeb measures -- 4.5 Further questions and problems -- Suggestions for Further Reading -- Bibliography -- Index.
Abstract:
In the early 1960s, by using techniques from the model theory of first-order logic, Robinson gave a rigorous formulation and extension of Leibniz' infinitesimal calculus. Since then, the methodology has found applications in a wide spectrum of areas in mathematics, with particular success in the probability theory and functional analysis. In the latter, fruitful results were produced with Luxemburg's invention of the nonstandard hull construction. However, there is still no publication of a coherent and self-contained treatment of functional analysis using methods from nonstandard analysis. This publication aims to fill this gap.
Local Note:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
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