books.google.com - The last five years have seen an immense growth in the use of symbolic computing and mathematical software packages such as Maple. The first three chapters of this book provide a user-friendly introduction to computer-assisted algebra with Maple. The rest of the book then develops these techniques and...http://books.google.com/books/about/Advanced_Mathematical_Methods_with_Maple.html?id=AKsLy0rVGuwC&q=perturbation+expansion&utm_source=gb-gplus-shareAdvanced Mathematical Methods with Maple