Difficult exercises are marked with an asterisk, and more challenging exercises have two asterisks. A solutions manual containing solutions to almost all the exercises is available online to instructors from the Addison Wesley Longman Publishing Company. Instructors should contact their Addison-Wesley local sales representative for information on the manual's availability. References References are placed at the end of each chapter. Generally the references either are historical, representing the original source of the material, or they represent extensions and improvements to the results given in the text.
Some references represent solutions to exercises.
The exact location of this material may change. Acknowledgments Many, many people have helped me in the preparation of books in this series. As usual, the writing process was made easier by the professionals at Addison Wesley Longman. I'd also like to thank Kris Engberg and her staff at Publication Services for their usual fine work putting the final pieces together. I would like to thank the reviewers, who provided valuable comments, many of which have been incorporated into the text.