This book develops the theory of ordinary differential equations (ODEs),
starting from an introductory level (with no prior experience in ODEs
assumed) through to a graduate-level treatment of the qualitative
theory, including bifurcation theory (but not chaos). While proofs are
rigorous, the exposition is reader-friendly, aiming for the informality
of face-to-face interactions.
A unique feature of this book is the integration of rigorous theory with
numerous applications of scientific interest. Besides providing
motivation, this synthesis clarifies the theory and enhances scientific
literacy. Other features include: (i) a wealth of exercises at various
levels, along with commentary that explains why they matter; (ii)
figures with consistent color conventions to identify nullclines,
periodic orbits, stable and unstable manifolds; and (iii) a dedicated
website with software templates, problem solutions, and other resources
supporting the text (www.math.duke.edu/ode-book).
Given its many applications, the book may be used comfortably in science
and engineering courses as well as in mathematics courses. Its level is
accessible to upper-level undergraduates but still appropriate for
graduate students. The thoughtful presentation, which anticipates many
confusions of beginning students, makes the book suitable for a teaching
environment that emphasizes self-directed, active learning (including
the so-called inverted classroom).