# An Introduction to Dynamical Systems: Continuous and Discrete

American Mathematical Soc., 2012 - 733 pages
This book gives a mathematical treatment of the introduction to qualitative differential equations and discrete dynamical systems. The treatment includes theoretical proofs, methods of calculation, and applications. The two parts of the book, continuous time of differential equations and discrete time of dynamical systems, can be covered independently in one semester each or combined together into a year long course. The material on differential equations introduces the qualitative or geometric approach through a treatment of linear systems in any dimension. There follows chapters where equilibria are the most important feature, where scalar (energy) functions is the principal tool, where periodic orbits appear, and finally, chaotic systems of differential equations. The many different approaches are systematically introduced through examples and theorems. The material on discrete dynamical systems starts with maps of one variable and proceeds to systems in higher dimensions. The treatment starts with examples where the periodic points can be found explicitly and then introduces symbolic dynamics to analyze where they can be shown to exist but not given in explicit form. Chaotic systems are presented both mathematically and more computationally using Lyapunov exponents. With the one-dimensional maps as models, the multidimensional maps cover the same material in higher dimensions. This higher dimensional material is less computational and more conceptual and theoretical. The final chapter on fractals introduces various dimensions which is another computational tool for measuring the complexity of a system. It also treats iterated function systems which give examples of complicated sets. In the second edition of the book, much of the material has been rewritten to clarify the presentation. Also, some new material has been included in both parts of the book. This book can be used as a textbook for an advanced undergraduate course on ordinary differential equations and/or dynamical systems. Prerequisites are standard courses in calculus (single variable and multivariable), linear algebra, and introductory differential equations.

### Table des matières

 Geometric Approach to Differential Equations 3 Linear Systems 11 Solutions of Nonlinear Equations 75 Phase Portraits with Emphasis on Fixed Points 109 Phase Portraits Using Scalar Functions 169 Periodic Orbits 213 Chaotic Attractors 285 Iteration of Functions as Dynamics 343
 Itineraries for OneDimensional Maps 423 Invariant Sets for OneDimensional Maps 487 Periodic Points of Higher Dimensional Maps 541 Invariant Sets for Higher Dimensional Maps 597 Fractals 669 Appendix A Background and Terminology 705 Appendix B Generic Properties 717 Index 727

 Periodic Points of OneDimensional Maps 353
 Droits d'auteur

### À propos de l'auteur (2012)

R. Clark Robinson, PhD, Professor Emeritus, Department of Mathematics, Northwestern University, IL, USA.