Product Description: In this book, the "canard phenomenon" occurring in Van der Pol's equation $\epsilon \ddot x+(x^2+x)\dot x+x-a=0$ is studied. For sufficiently small $\epsilon >0$ and for decreasing $a$, the limit cycle created in a Hopf bifurcation at $a = 0$ stays of "small size" for a while before it very rapidly changes to "big size", representing the typical relaxation oscillation...read more