An introduction to nonlinear analysis 1st Edition by Martin Schechter ISBN 0521843979 9780521843973 by Schechter M. 0521843979 instant download after payment.

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ISBN 10: 0521843979 
ISBN 13: 9780521843973
Author: Martin Schechter

The techniques that can be used to solve non-linear problems are far different than those that are used to solve linear problems. Many courses in analysis and applied mathematics attack linear cases simply because they are easier to solve and do not require a large theoretical background in order to approach them. Professor Schechter's 2005 book is devoted to non-linear methods using the least background material possible and the simplest linear techniques. An understanding of the tools for solving non-linear problems is developed whilst demonstrating their application to problems in one dimension and then leading to higher dimensions. The reader is guided using simple exposition and proof, assuming a minimal set of pre-requisites. For completion, a set of appendices covering essential basics in functional analysis and metric spaces is included, making this ideal as an accompanying text on an upper-undergraduate or graduate course, or even for self-study.

An introduction to nonlinear analysis 1st Table of contents:

1 Extrema
1.1 Introduction
1.2 A one dimensional problem
1.3 The Hilbert space H
1.4 Fourier series
1.5 Finding a functional
1.6 Finding a minimum, I
1.7 Finding a minimum, II
1.8 A slight improvement
1.9 Finding a minimum, III
1.10 The linear problem
1.11 Nontrivial solutions
1.12 Approximate extrema
1.13 The Palais–Smale condition
1.14 Exercises
2 Critical points
2.1 A simple problem
2.2 A critical point
2.3 Finding a Palais–Smale sequence
2.4 Pseudo-gradients
2.5 A sandwich theorem
2.6 A saddle point
2.7 The chain rule
2.8 The Banach fixed point theorem
2.9 Picard’s theorem
2.10 Continuous dependence of solutions
2.11 Continuation of solutions
2.12 Extending solutions
2.13 Resonance
2.14 The question of nontriviality
2.15 The mountain pass method
2.16 Other intervals for asymptotic limits
2.17 Super-linear problems
2.18 A general mountain pass theorem
2.19 The Palais–Smale condition
2.20 Exercises
3 Boundary value problems
3.1 Introduction
3.2 The Dirichlet problem
3.3 Mollifiers
3.4 Test functions
3.5 Differentiability
3.6 The functional
3.7 Finding a minimum
3.8 Finding saddle points
3.9 Other intervals
3.10 Super-linear problems
3.11 More mountains
3.12 Satisfying the Palais–Smale condition
3.13 The linear problem
3.14 Exercises
4 Saddle points
4.1 Game theory
4.2 Saddle points
4.3 Convexity and lower semi-continuity
4.4 Existence of saddle points
4.5 Criteria for convexity
4.6 Partial derivatives
4.7 Nonexpansive operators
4.8 The implicit function theorem
4.9 Exercises
5 Calculus of variations
5.1 Introduction
5.2 The force of gravity
5.3 Hamilton’s principle
5.4 The Euler equations
5.5 The Gˆateaux derivative
5.6 Independent variables
5.7 A useful lemma
5.8 Sufficient conditions
5.9 Examples
5.10 Exercises
6 Degree theory
6.1 The Brouwer degree
6.2 The Hilbert cube
6.3 The sandwich theorem
6.4 Sard’s theorem
6.5 The degree for differentiable functions
6.6 The degree for continuous functions
6.7 The Leray–Schauder degree
6.8 Properties of the Leray–Schauder degree
6.9 Peano’s theorem
6.10 An application
6.11 Exercises
7 Conditional extrema
7.1 Constraints
7.2 Lagrange multipliers
7.3 Bang–bang control
7.4 Rocket in orbit
7.5 A generalized derivative
7.6 The definition
7.7 The theorem
7.8 The proof
7.9 Finite subsidiary conditions
7.10 Exercises
8 Mini-max methods
8.1 Mini-max
8.2 An application
8.3 Exercises
9 Jumping nonlinearities
9.1 The Dancer–Fucík spectrum
9.2 An application
9.3 Exercises
10 Higher dimensions
10.1 Orientation
10.2 Periodic functions
10.3 The Hilbert spaces Ht
10.4 Compact embeddings
10.5 Inequalities
10.6 Linear problems
10.7 Nonlinear problems
10.8 Obtaining a minimum
10.9 Another condition
10.10 Nontrivial solutions
10.11 Another disappointment
10.12 The next eigenvalue
10.13 A Lipschitz condition
10.14 Splitting subspaces
10.15 The question of nontriviality
10.16 The mountains revisited
10.17 Other intervals between eigenvalues
10.18 An example
10.19 Satisfying the PS condition
10.20 More super-linear problems
10.21 Sobolev’s inequalities
10.22 The case q = 8
10.23 Sobolev spaces

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