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Mathematics - Analysis | Postmodern Analysis

Postmodern Analysis

Series: Universitext

Jost, Jürgen

2nd ed. 2003, XVII, 371 p.

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What is the title of this book intended to signify, what connotations is the adjective "Postmodern" meant to carry? A potential reader will surely pose this question. To answer it, I should describe what distinguishes the approach to analysis presented here from what has been called "Modern Analysis" by its protagonists. "Modern Analysis" as represented in the works of the Bour­ baki group or in the textbooks by Jean Dieudonne is characterized by its systematic and axiomatic treatment and by its drive towards a high level of abstraction. Given the tendency of many prior treatises on analysis to degen­ erate into a collection of rather unconnected tricks to solve special problems, this definitely represented a healthy achievement. In any case, for the de­ velopment of a consistent and powerful mathematical theory, it seems to be necessary to concentrate solely on the internal problems and structures and to neglect the relations to other fields of scientific, even of mathematical study for a certain while. Almost complete isolation may be required to reach the level of intellectual elegance and perfection that only a good mathematical theory can acquire. However, once this level has been reached, it might be useful to open one's eyes again to the inspiration coming from concrete ex­ ternal problems.

Content Level » Graduate

Keywords » Banach Space - Eigenvalue - Implicit function - Lebesgue integration - banach spaces - calculus - calculus of variations - differential calculus - differential equation - integral - integration - maximum principle - ordinary differential equation - partial differentia

Related subjects » Analysis - Dynamical Systems & Differential Equations

Table of contents 

I. Calculus for Functions of One Variable.- 0. Prerequisites.- 1. Limits and Continuity of Functions.- 2. Differentiability.- 3. Characteristic Properties of Differentiable Functions. Differential Equations.- 4. The Banach Fixed Point Theorem. The Concept of Banach Space.- 5. Uniform Convergence. Interchangeability of Limiting Processes. Examples of Banach Spaces. The Theorem of Arzela-Ascoli.- 6. Integrals and Ordinary Differential Equations.- II. Topological Concepts.- 7. Metric Spaces: Continuity, Topological Notions, Compact Sets.- III. Calculus in Euclidean and Banach Spaces.- 8. Differentiation in Banach Spaces.- 9. Differential Calculus in ?d.- 10. The Implicit Function Theorem. Applications.- 11. Curves in ?d. Systems of ODEs.- IV. The Lebesgue Integral.- 12. Preparations. Semicontinuous Functions.- 13. The Lebesgue Integral for Semicontinuous Functions. The Volume of Compact Sets.- 14. Lebesgue Integrable Functions and Sets.- 15. Null Functions and Null Sets. The Theorem of Fubini.- 16. The Convergence Theorems of Lebesgue Integration Theory.- 17. Measurable Functions and Sets. Jensen’s Inequality. The Theorem of Egorov.- 18. The Transformation Formula.- V. Lp and Sobolev Spaces.- 19. The Lp-Spaces.- 20. Integration by Parts. Weak Derivatives. Sobolev Spaces.- VI. Introduction to the Calculus of Variations and Elliptic Partial Differential Equations.- 21. Hilbert Spaces. Weak Convergence.- 22. Variational Principles and Partial Differential Equations.- 23. Regularity of Weak Solutions.- 24. The Maximum Principle.- 25. The Eigenvalue Problem for the Laplace Operator.- Index of Notation.

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