A textbook presenting the theory and underlying techniques of perturbation methods in a manner suitable for senior undergraduates from a broad range of discipli

This book is a revised and updated version, including a substantial portion of new material, of J. D. Cole's text Perturbation Methods in Applied Mathe matics,

The importance of mathematics in the study of problems arising from the real world, and the increasing success with which it has been used to model situations r