This book presents the theory of optimal and critical regularities of groups of diffeomorphisms, from the classical work of Denjoy and Herman, up through recent

Introduction to Compact Transformation Groups

In this partly expository work, a framework is developed for building exotic circle actions of certain classical groups. The authors give general combination th

This unique reference, aimed at research topologists, gives an exposition of the 'pseudo-Anosov' theory of foliations of 3-manifolds. This theory generalizes Th