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Almost Periodic Oscillations and Waves

Almost Periodic Oscillations and Waves

von: Constantin Corduneanu

Springer-Verlag, 2009

ISBN: 9780387098197, 313 Seiten

Format: PDF, OL

Mac OSX,Windows PC Apple iPad, Android Tablet PC's Online-Lesen für: Linux,Mac OSX,Windows PC

Preis: 67,36 EUR

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Almost Periodic Oscillations and Waves


 

Preface

5

Contents

7

1 Introduction

9

2 Metric Spaces and Related Topics

22

2.1 Metric Spaces

22

2.2 Banach Spaces and Hilbert Spaces

27

2.3 Function Spaces: Continuous Case

35

2.4 Completion of Metric Spaces

40

2.5 Function Spaces: Measurable Case

45

3 Basic Properties of Almost Periodic Functions

56

3.1 The Space AP1(R, C)

56

3.2 The Space AP(R, C)

60

3.3 The Space S(R, C)

67

3.4 Besicovitch Spaces; the Mean Value

71

3.5 The Space AP(R, X), X-Banach Space

78

3.6 Almost Periodic Functions Depending on Parameters

88

3.7 Variations on the Theme of Almost Periodicity

94

4 Fourier Analysis of Almost Periodic Functions

103

4.1 General Remarks

103

4.2 The Fourier Series Associated to an Almost Periodic Function

105

4.3 Convergence of Fourier Series

111

4.4 Summability of Fourier Series

117

4.5 The Fourier Series of Almost Periodic Functions in Banach Spaces

123

4.6 Further Topics Related to Fourier Series

132

5 Linear Oscillations

137

5.1 The Equation x.(t) = f(t)

137

5.2 Weakly Almost Periodic Functions

143

5.3 The Equation x.(t) = f(t) in Banach Spaces

150

5.4 Linear Oscillations Described by Ordinary Differential Equations

156

5.5 Linear Periodic and Almost Periodic Oscillations in Systems Described by Convolution Equations

162

5.6 Further Results on Almost Periodic Oscillations in Linear Time-Invariant Systems

171

5.7 Almost Periodic Oscillations in Linear Time-Varying Systems

184

6 Almost Periodic Nonlinear Oscillations

191

6.1 Quasilinear Systems

191

6.2 Separated Solutions: Amerio’s Theory

196

6.3 The Second-Order Equation of Nonlinear Oscillations (Li´enard’s Type)

202

6.4 Equations with Monotone Operators

207

6.5 Gradient Type Systems

214

6.6 Qualitative Differential Inequalities

224

6.7 Further Results on Nonlinear Almost Periodic Oscillations; Perturbed Systems

231

6.8 Oscillations in Discrete Processes

236

6.9 Oscillations in Systems Governed by Integral Equations

245

7 Almost Periodic Waves

253

7.1 Some General Remarks

253

7.2 Periodic Solitary Waves in One-Dimensional Hyperbolic and Parabolic Structures

257

7.3 Almost Periodic Heat Waves

262

7.4 Almost Periodic Waves; a Linear Case

273

7.5 Almost Periodic Waves; a Mildly Nonlinear System

280

7.6 A Case with Data on Characteristics

286

7.7 Miscellanea

292

7.8 Quasi-periodic Waves

300

References

307

Index

312