David Bressoud is DeWitt Wallace Professor and Chair of Mathematics and Computer Science at Macalester College. He was a Peace Corps Volunteer in Antigua, West Indies, and taught at Penn State before moving to Macalester in 1994, the year he won the MAA Distinguished Teaching Award. His books include Factorization and Primality Testing; Second Year Calculus: From Celestial Mechanics to Special Relativity; A Radical Approach to Real Analysis; and Proofs and Confirmations: The Story of the Alternating Sign Matrix Conjecture.
STAN WAGON is Professor of Mathematics and Computer Science at Macalester College. He is a leading expert in the use of Mathematica in teaching and has written many books on that subject, such as VisualDSolve: Visualizing Differential Equations with Mathematica (with Dan Schwalbe), Animating Calculus (with Ed Packel), and the best-selling Mathematica in Action. Other books include The Banach-Tarski Paradox and the problem book, Which Way Did the Bicycle Go? (with Joseph D. E. Konhauser and Dan Velleman). In 1987, he won the Lester R. Ford Award for expository writing.