This collection of counter-examples highlights the theory of differential equations and related topics which is now playing an enormously important role in the area of science, engineering and mathematics.
"The author knows his business: he has chosen the right counterexamples at the right time. The section on plane autonomous systems is particularly felicitous, and should be consulted by whoever teaches elementary differential equations (some of the examples are really cute and we will use them in our 400-student course next year). Why can't mathematicians write more books like this one?" G C Rota MIT
