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Camassa-Holm方程是一类十分重要而又特别的新型浅水波方程，有广泛的应用背景。该类方程存在一类尖峰孤立子，并且它是完全可积的,具有双哈密顿结构和Lax对。《Camassa-Holm方程》给出该类方程的物理背景并阐述它的完全可积性。对该类方程的行波解作分类，获得多种奇异孤立波解；给出该类方程的谱图理论和散射数据；利用反散射方法，给出该类方程的多孤立子解。获得该类方程的整体强解的存在性及整体弱解的存在性；得到该类方程柯西问题的局部适定性；研究它们的blow-up问题以及尖峰孤立子解的轨道稳定性。《Camassa-Holm方程》同时研究含尖峰孤立子的Degasperis-Procesi方程及b族方程，研究前一类方程激波的形成及动力学分析，给出b族方程的水波结构和非线性平衡关系，对Degasperis-Procesi方程的适定性给出具体证明。

Contents

Chapter 1 Physical Backgrounds and Complete Integrability of the Camassa-Holm Equation 1

1.1 Physical backgrounds of the Camassa-Holm equation 1

1.2 The complete integrability of the Camassa-Holm equation 9

1.3 Experimental observation and applications of solitons 17

References 18

Chapter 2 Traveling Wave Solutions of the Camassa-Holm Equation 33

2.1 Introduction 33

2.2 Notations 34

2.3 Weak form 36

2.4 Several types of traveling wave solutions 37

2.5 The proof Theorem 2.4.1 43

2.6 The correlation of parameters 59

2.7 Wave length 63

2.8 Explicit formulae of peakon 66

References 68

Chapter 3 The Scattering and Inverse Scattering of the Camassa-Holm Equation 71

3.1 Scattering of the Camassa-Holm equation 71

3.1.1 Introduction 71

3.1.2 Spectral graph theory 72

3.1.3 The scattering problem 82

3.2 The solutions of Camassa-Holm equation 89

3.2.1 Introduction 89

3.2.2 Summary of the process 89

3.2.3 Summary of solving process 93

3.2.4 Solitary wave solutions 93

3.2.5 2-soliton solutions 97

3.2.6 Examples and properties of 2-soliton solutions 102

3.2.7 3-soliton solutions 106

3.2.8 Summary 109

References 111

Chapter 4 Well-posedness of the Camassa-Holm Equation 113

4.1 Global existence of strong solutions 113

4.1.1 The existence of local solutions 113

4.1.2 The existence of global solutions 120

4.2 The existence of global weak solutions 128

4.3 The local well posedness of the Cauchy problem to the Camassa-Holm equation in Hs (s > 2/3) 138

4.4 Blow-up phenomena of the Camassa-Holm equation 145

4.5 The orbital stability of peakon solutions 153

References 157

Chapter 5 Formation and Dynamics Analysis of Shock Wave of the Degasperis-Procesi Equation 159

5.1 Introduction 159

5.1.1 Peakons 159

5.1.2 Generalized weak solutions 162

5.2 The shock wave of the DP equation 164

5.3 Peakon, anti-peakon and the formation of shock waves 172

5.4 Shock wave dynamics 184

5.5 Concluding remarks 190

References 191

Chapter 6 Water Wave Structure and Nonlinear Equilibrium of 6-Family Nonlinear Shallow Water Wave Equation 194

6.1 Introduction 195

6.1.1 6-family shallow water wave equation 195

6.1.2 Outline of the paper 196

6.2 History and general properties of the 6-equation 197

6.2.1 Discrete symmetries: reversibility, parity, and signature 199

6.2.2 Lagrangian representation 199

6.2.3 Preservation of the norm ||m||L1/b, 0≤b≤1 200

6.2.4 Lagrangian representation for integer b 201

6.2.5 Reversibility and Galilean covariance 202

6.2.6 Integral momentum conservation 202

6.3 Traveling waves and generalized functions 203

6.3.1 The case of b = 0 203

6.3.2 The case of b ≠ 0 205

6.3.3 The case of b > 0 206

6.3.4 The case of b

6.4 Pulson interactions for b > 0 214

6.4.1 Pulson interactions for b = 2 215

6.4.2 Peakon interactions for b = 2 and b = 3: numerical results 215

6.4.3 Pulson-pulson interactions for b > 0 and symmetric g 217

6.4.4 Pulson-antipulson interactions for b> 1 and symmetric g 220

6.4.5 Specializing pulsons to peakons for b = 2 and b = 3 222

6.5 Peakons of width a for arbitrary b 223

6.5.1 The slope dynamics of peakons: inflection points and the steepening lemma when 1 6.5.2 The case of 0≤b≤1 226

6.6 Adding viscosity to peakon dynamics 226

6.6.1 Burgers-a^ equation: analytical estimates 228

6.6.2 The traveling waves of Burgers-αβ equation for P(3 - b) = 1 and v = 0 230

6.7 The peakons under (6.1.1) adding viscosity and evolution of (6.1.2) Burgers-αβ 231

6.7.1 The fate of peakons under adding viscosity 231

6.7.2 The fate of peakons under Burgers-ap evolution 238

6.8 Numerical results for peakon scattering and initial value problems 241

6.8.1 Peakon initial value problems 241

6.8.2 Description of our numerical methods 243

6.9 Conclusions 245

References 247

Chapter 7 The Degasperis-Procesi Equation 249

7.1 Introduction 249

7.2 Local well-posedness 253

7.3 Blow up 255

7.4 Global strong solutions 259

7.5 Global weak solutions 263

7.6 Recent results and problems 278

References 284

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书籍介绍

Camassa-Holm方程是一类十分重要而又特别的新型浅水波方程，有广泛的应用背景。该类方程存在一类尖峰孤立子，并且它是完全可积的,具有双哈密顿结构和Lax对。《Camassa-Holm方程》给出该类方程的物理背景并阐述它的完全可积性。对该类方程的行波解作分类，获得多种奇异孤立波解；给出该类方程的谱图理论和散射数据；利用反散射方法，给出该类方程的多孤立子解。获得该类方程的整体强解的存在性及整体弱解的存在性；得到该类方程柯西问题的局部适定性；研究它们的blow-up问题以及尖峰孤立子解的轨道稳定性。《Camassa-Holm方程》同时研究含尖峰孤立子的Degasperis-Procesi方程及b族方程，研究前一类方程激波的形成及动力学分析，给出b族方程的水波结构和非线性平衡关系，对Degasperis-Procesi方程的适定性给出具体证明。