Dr. James Stewart (late) received his M.S. from Stanford University and his Ph.D. from the University of Toronto. James did research at the University of London and was influenced by the famous mathematician George Polya at Stanford University. Dr. Stewart was most recently Professor of Mathematics at McMaster University, and his research field was harmonic analysis. Stewart was the author of a best-selling calculus book series published by Cengage Learning, including Calculus: Concepts And Contexts, and Calculus, Calculus: Early Transcendentals as well as a series of precalculus textbooks.