Asymptotic Analysis and Singular Perturbation Theory
Asymptotic Analysis and Singular Perturbation Theory
Asymptotic Analysis and Singular Perturbation Theory
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Contents<br />
Chapter 1 Introduction 1<br />
1.1 <strong>Perturbation</strong> theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1<br />
1.1.1 <strong>Asymptotic</strong> solutions . . . . . . . . . . . . . . . . . . . . . . . . . 1<br />
1.1.2 Regular <strong>and</strong> singular perturbation problems . . . . . . . . . . . . 2<br />
1.2 Algebraic equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3<br />
1.3 Eigenvalue problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />
1.3.1 Quantum mechanics . . . . . . . . . . . . . . . . . . . . . . . . . 9<br />
1.4 Nondimensionalization . . . . . . . . . . . . . . . . . . . . . . . . . . . 12<br />
Chapter 2 <strong>Asymptotic</strong> Expansions 19<br />
2.1 Order notation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />
2.2 <strong>Asymptotic</strong> expansions . . . . . . . . . . . . . . . . . . . . . . . . . . . 20<br />
2.2.1 <strong>Asymptotic</strong> power series . . . . . . . . . . . . . . . . . . . . . . . 21<br />
2.2.2 <strong>Asymptotic</strong> versus convergent series . . . . . . . . . . . . . . . . 23<br />
2.2.3 Generalized asymptotic expansions . . . . . . . . . . . . . . . . . 25<br />
2.2.4 Nonuniform asymptotic expansions . . . . . . . . . . . . . . . . . 27<br />
2.3 Stokes phenomenon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27<br />
Chapter 3 <strong>Asymptotic</strong> Expansion of Integrals 29<br />
3.1 Euler’s integral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29<br />
3.2 Perturbed Gaussian integrals . . . . . . . . . . . . . . . . . . . . . . . 32<br />
3.3 The method of stationary phase . . . . . . . . . . . . . . . . . . . . . . 35<br />
3.4 Airy functions <strong>and</strong> degenerate stationary phase points . . . . . . . . . 37<br />
3.4.1 Dispersive wave propagation . . . . . . . . . . . . . . . . . . . . 40<br />
3.5 Laplace’s Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43<br />
3.5.1 Multiple integrals . . . . . . . . . . . . . . . . . . . . . . . . . . 45<br />
3.6 The method of steepest descents . . . . . . . . . . . . . . . . . . . . . 46<br />
Chapter 4 The Method of Matched <strong>Asymptotic</strong> Expansions: ODEs 49<br />
4.1 Enzyme kinetics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49<br />
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