Hidetoshi Fukagawa

Fukagawa Hidetoshi is a retired high-school teacher in Japan and one of the world's experts on "sangaku." He is the coauthor of "Japanese Temple Geometry Problems." Tony Rothman is a theoretical cosmologist who lectures in physics at Princeton University. His books include "Everything's Relative and Other Fables from Science and Technology."

Fukagawa Hidetoshi is a retired high-school teacher in Japan and one of the world's experts on "sangaku." He is the coauthor of "Japanese Temple Geometry Problems." Tony Rothman is a theoretical cosmologist who lectures in physics at Princeton University. His books include "Everything's Relative and Other Fables from Science and Technology." See less