About the Author
S. M. Ulam (1909-1984) was born in Poland and was a key member of the now legendary Polish School of Mathematics. In the United States from 1935 on, he received many academic appointments and honors and authored many articles, essays, and mathematical books, including Analogies between Analogies (California, 1990). Daniel Hirsch is President of the Committee to Bridge the Gap, located in Los Angeles. William G. Mathews is Professor of Astrophysics at the University of California, Santa Cruz. Françoise Ulam is a resident of Santa Fe, New Mexico. Jan Mycielski is Professor of Mathematics at the University of Colorado.