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Algebraic methods in nonlinear perturbation theory applied mathematical sciences vol 88, Softcover reprint of the original 1st ed. 1991 Applied Mathematical Sciences Series, Vol. 88

Langue : Anglais

Auteurs :

Couverture de l’ouvrage Algebraic methods in nonlinear perturbation theory applied mathematical sciences vol 88
This book will be of interest for everybody working on perturbation theory in differential equations. The book requires only a standard mathematical background for engineers and does not require reference to the special literature. Topics which are covered include: matrix perturbation theory, systems of ordinary differential equations with small parameter, reconstruction and equations in partial derivatives. Boundary problems are not discussed in this volume. The reader will find many examples throughout the book.
1 Matrix Perturbation Theory.- 1.1 Perturbation Theory for a Linear Operator.- 1.2 Main Formulas.- 1.3 Diagonal Leading Operator.- 1.4 General Case. The Normal Form of the Matrix of the Operator M.- 1.5 Nilpotent Leading Operator. The Reconstruction Problem.- 2 Systems of Ordinary Differential Equations with a Small Parameter.- 2.1 Passage to the Linear Problem. Change of Variables Operator.- 2.2 General Formulation of the Perturbation Theory Problem.- 2.3 Canonical Form of First Order Operator X0.- 2.4 An Algebraic Formulation of the Perturbation Theory Problem.- 2.5 The Normal Form of an Operator with Respect to a Nilpotent X0. The Reconstruction Problem.- 2.6 A Connection with N. N. Bogolyubov’s Ideas.- 2.7 The Motion Near the Stationary Manifold.- 2.8 Hamiltonian Systems.- 3 Examples.- 3.1 Example: The Pendulum of Variable Length.- 3.2 Example: A Second Order Linear Equation.- 3.3 Example: P. L. Kapitsa’s Problem: A Pendulum Suspended from an Oscillating Point.- 3.4 Example: Van der Pol Oscillator with Small Damping.- 3.5 Example: Duffing Oscillator.- 3.6 Example: Drift of a Charged Particle in an Electromagnetic Field.- 3.7 Example: Nonlinear System: Example of an Extension of an Operator.- 3.8 Example: Nonlinear Oscillator with Small Mass and Damping.- 3.9 Example: A Nonlinear Equation; Boundary-Layer-Type Problem.- 3.10 Example: Resonances. Particular Solutions.- 3.11 Example: The Mathieu Equation.- 3.12 Example: Oscillating Spring.- 3.13 Example: Periodic Solution (Hopf’s Theorem).- 3.14 Example: Bifurcation.- 3.15 Example: Problem of a Periodic Solution of an Autonomous System.- 3.16 Example: One Problem on Eigenvalues.- 3.17 Example: A. M. Lyapunov’s Problem.- 3.18 Example: Illustration for Section 2.5.- 3.19 Example: Fast Rotation of a Solid Body.- 3.20 Example: The Langer Problem ([28]).- 4 Reconstruction.- 4.1 Introduction.- 4.2 New Leading Operators in the First Type Problems.- 4.3 The Second Type Problems. “Algebraic” Method of Reconstruction.- 4.4 “Trajectory” Method of Reconstruction.- 4.5 Matching.- 4.6 Example: Illustration for 4.5.- 4.7 Example: Appearance of a New Singularity.- 4.8 Example: Passing Through a Resonance.- 4.9 Example: WKB-Type Problem.- 4.10 Example: Lighthill’s Problem [38].- 4.11 Example: Singularity of Coefficients of an Operator.- 4.12 Example: A Second Order Linear Equation.- 4.13 Example: Van der Pol Oscillator (Relaxation Oscillations).- 5 Equations in Partial Derivatives.- 5.1 Functional Derivatives.- 5.2 Equations with Partial Derivatives Whose Principal Part Is an Ordinary Differential Equation.- 5.3 Partial Derivatives. On Whitham Method.- 5.4 Geometric Optics and the Maslov Method.- 5.5 Problem (Whitham).- 5.6 Problem. Diffraction of Short Waves on a Circle (Semishade).- 5.7 One-Dimensional Shock Wave.- References.

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