本書主要討論不同類型的自治和非自治不連續(xù)微分方程中的分岔。那些具有跳躍的微分方程既可以是右端點(diǎn)不連續(xù)的,也可以是在軌跡上不連續(xù),或是方程解的區(qū)間常數(shù)近似的。本書的結(jié)果可以應(yīng)用于各個(gè)領(lǐng)域,如神經(jīng)網(wǎng)絡(luò)、腦動(dòng)力學(xué)、機(jī)械系統(tǒng)、天氣現(xiàn)象、人口動(dòng)力學(xué)等。毫無疑問,分岔理論應(yīng)該進(jìn)一步發(fā)展到不同類型的微分方程。在這個(gè)意義上,本書將是這個(gè)領(lǐng)域的首創(chuàng)。讀者將從本書了解到該理論的最新成果,學(xué)會(huì)如何將該理論應(yīng)用到不同類型的不連續(xù)微分方程的具體方法。此外,讀者將學(xué)習(xí)到分析這些方程的非自治分岔情況的最新方法。
1 Introduction
1.1 General Description of Differential Equations with Discontinuities
1.1.1 Impulsive Differential Equations
1.1.2 Differential Equations with Piecewise Constant Argument
1.1.3 Differential Equations with Discontinuous Right-Hand Sides
1.2 Nonautonomous Bifurcation
1.3 The Bemoulli Equations
1.4 Organization of the Book
2 Hopf Bifurcation in Impulsive Systems
2.1 Hopf Bifurcation of a Discontinuous Limit Cycle
2.1.1 The Nonperturbed System
2.1.2 The Perturbed System
2.1.3 Foci of the D-System
2.1.4 The Center and Focus Problem
2.1.5 Bifurcation of a Discontinuous Limit Cycle
2.1.6 Examples
2.2 3D Discontinuous Cycles
2.2.1 Introduction
2.2.2 The Nonperturbed System
2.2.3 The Perturbed System
2.2.4 Center Manifold
2.2.5 Bifurcation of Periodic Solutions
2.2.6 Examples
2.3 Periodic Solutions of the Van der Pol Equation
2.3.1 Introduction and Preliminaries
2.3.2 Theoretical Results
2.3.3 Center Manifold
2.4 Notes
3 Hopf Bifurcation in Filippov Systems
3.1 Nonsmooth Planar Limit Cycle from a Vertex
3.1.1 Introduction
3.1.2 The Nonperturbed System
3.1.3 The Perturbed System
3.1.4 The Focus-Center Problem
3.1 5 Bifurcation of Periodic Solutions
3.1.6 An Example
3.2 3D Filippov System
3.2.1 Introduction
3.2.2 The Nonperturbed System
3.2.3 The Perturbed System
3.2.4 Center Manifold
3.2.5 Bifurcation of Periodic Solutions
3.2.6 An Example
3.3 Notes
4 Nonautonomous Bifurcation in Impulsive Bernoulli Equations
4.1 The Transcritical and the Pitchfork Bifurcations
4.1.1 Introduction
4.1.2 Preliminaries
4.1.3 The Pitchfork Bifurcation
4.1.4 The Transcritical Bifurcation
4.2 Impulsive Bernoulli Equations: The Transcritical and the Pitchfork Bifurcations
4.2.1 Introduction and Preliminaries
4.2.2 Bounded Solutions
4.2.3 The Pitchfork Bifufcation
4.2.4 The Transcritical Bifurcation
4.2.5 Illustrative Examples
4.3 Notes
5 Nonautonomous Bifurcations in Nonsolvable Impulsive Systems
5.1 The Transcritical and the Pitchfork Bifurcations
5.1.1 Introduction
5.1.2 Preliminaries
5.1.3 Attractivity and Repulsivity in a Linear Impulsive Nonhomogeneous Systems
5.1 4 The Transcritical Bifurcation
5.1 5 The Pitchfork Bifurcation
5.2 Finite-Time Nonautonomous Bifurcations
5.2.1 Introduction and Preliminaries
5.2.2 Attractivity and Repulsivity in a Linear Nonhomogeneous Impulsive System
5.2.3 Bifurcation Analysis
5.2.4 An Example
5.3 Notes
6 Nonautonomous Bifurcations in Bernoulli Differential Equations with Piecewise Constant Argument of Generalized Type
6.1 Introduction and Preliminaries
6.1.1 Attraction and Stability
6.2 Bounded Solutions
6.3 The Pitchfork Bifurcation
6.4 The Transcritical Bifurcation
6.5 Illustrative Examples
6.6 Notes
References