ACKNOWLEDGMENTS

This book would not have been possible without the consistent, intelligent, and enthusiastic support of the librarians at the Santa Fe Institute, Ms. Margaret Alexander and Mr. Timothy Taylor, and the commitment and clarity of thought and language of Valerie Clement. This book greatly benefited from the support and editorial wisdom of Vickie Kearn of Princeton University Press and her staff.

We would like to acknowledge and extend thanks for the contribution of our friend Frank Wimberly, who translated from Spanish to English the words of José Luis Massera and his compatriots about their experiences in the Uruguayan prison called Libertad.

For reading one or several chapters in draft form, for permission to quote, and for correcting errors and verifying accuracy, we thank Roger Frye, Claudia Henrion, Alexander Shen, Freeman Dyson, Ivor Grattan-Guinness, Chandler Davis, Allyn Jackson, Roy Lisker, Jenny Harrison, Moe Hirsch, Calvin C. Moore, Robert Osserman, Underwood Dudley, Nel Noddings, Kristin Umland, Cathy Fosnot, Peter Lax, Mary Ellen Rudin, Clarence Stephens, Nel Kroeger, Laura Cameron, Harry Lucas Jr., Richard J. Griego, Don Lemons, Jim Dudley, Peter Ross, Marjorie Senechal, Richard Kitchen, The Mathematical Intelligencer, the American Mathematical Society, and the Mathematical Association of America.

For supportive, instructive, and inspiring conversations and letters over the years, we thank Sergio Albeverio, Michael Baron, Jonathan Borwein, Billy Brown, Mario Bunge, Laura Cameron, Menon Charbonneau, Paul Cohen, Brian Conrey, John Conway, Vageli Coutsias, Chandler Davis, Phil and Hadassah Davis, Martin Davis, Persi Diaconis, Jim and Mary Dudley, Underwood Dudley, Harold Edwards, Jim Ellison, Pedro Embid, Bernie Epstein, Dick Epstein, Paul Fawcett, Paul Fife, Cathy Fosnot, Marilyn Frankenstein, Claire and Roger Frye, Murray Gell-Mann, Jekuthiel Ginsberg, Sylvia P. Glick, Brian Greer, Richard J. Griego, Tom and Rosa Hagstrom, Liong-Shin Hahn, Cliff Harris, Eva Hersh, Einar Hille, Moe Hirsch, Fritz John, Maria del Carmen Jorge Jorge, Tom, Gael, and Nick Keyes, Allyn Jackson, Kirk Jensen, Richard Kitchen, Morris Kline, Steve Krantz, Serge Lang, Anneli and Peter D. Lax, Don Lemons, Ina Lindemann, Roy Lisker, Jens Lorentz, Wilhelm Magnus, Elena Marchisotto, Lisa Mersky, Cathleen Morawetz, Ed Nelson, Nel Noddings, Paul Noren, Bob Osserman, Cristina Pereyra, Ralph Philips, Klaus Peters, Arthur Powell, Gian-Carlo Rota, Peter Ross, Jill and Neal Singer, J. J. Schaffer, Santiago Simanca, Ernesto Sobrevilla-Soto, Stan Steinberg, Constantino Tsallis, Robert Thomas, Kristin Umland, Greg Unnever, Wilfredo Urbina, Cotten and Larry Wallen, Hao Wang, and Frank Wimberly.

Remaining errors and inaccuracies are of course the responsibility of the authors.