Differential Equations, Bifurcations and Chaos

This book introduces qualitative methods for understanding differential equations, especially when analytical solutions are not possible. Aimed at second-year undergraduate students in mathematics or science, it assumes prior knowledge of calculus, linear algebra, and curve sketching. The book focuses on phase plane methods for second-order differential equations, supported by earlier sections on analytical techniques and phase lines for first-order equations. The later chapters explore bifurcation theory and chaos. Emphasizing application over theory, the book includes diagrams, worked examples, and exercises, with minimal use of formal proofs.

Chapter 1. Introduction. - Chapter 2. Analytical Methods for Differential Equations. - Chapter 3. Qualitative Methods for First-Order Differential Equations. - Chapter 4. Second-Order Linear Systems. - Chapter 5. Second-Order Nonlinear Systems. - Chapter 6. Bifurcations. - Chapter 7. Difference Equations. - Chapter 8. Chaos. - Chapter 9. Solutions to Odd-Numbered Exercises.