The American Mathematical Society gratefully acknowledges the
kindness of the following institutions and individuals in granting the
Graphics of the rice mountain in Chapter 6, the monkey in Chap-
ter 10, and Hilbert’s Hotel in Chapter 15.
Bertrand Russell Archives, McMaster University Library
Photograph of Bertrand Russell at the blackboard in Chapter 8.
Vagn Lundsgaard Hansen
Photograph of the bridge in Chapter 53.
Photograph of Andrew Wiles in Chapter 89 taken and owned by
The author wishes to express his gratitude to the American Mathe-
matical Society’s editorial and production departments for the careful
preparation of this book.