The pyramid geometry problem is from the book

Decomposing a cube is from the book

For detailed credits for drawings, including the cartoons by Gavin Wu, please click Drawing Credits .

Many aspects of the computing and mathematics represented here were taught to me in different ways over the years. I wish to thank Prof. David Cantor, Eskandar Ensafi, Byron Darrah, Prof. Dan Berry, and my students, for example Mounitra Chatterji, Ngoc Thithanh Duong, and many others. I also want to mention the freedom given me at The Cooper Union by Prof. Leroy Buckingham, the friendly memory of that by Dr. Robert J. Heilen, an appreciation of the written word engendered in me at Caltech by Prof. Hallet Smith, and of mathematical concepts, small symbols, and sustained proof also started there by Prof. Tom Apostol, and my UC Berkeley teachers, most of all Prof. Eugene Wong.