A professor of applied mathematics at Cornell University, in 2007, he received the Communications Award, a lifetime achievement award for the communication of mathematics to the general public. He previously taught at the Massachusetts Institute of Technology, where he received the E.M. Baker Award, an institute-wide teaching prize selected solely by students. “Chaos,” his series of 24 lectures on chaos theory, was filmed and produced in 2008 by The Teaching Company. He is the author, most recently, of “The Calculus of Friendship,” the story of his 30-year correspondence with his high school calculus teacher. He writes a series on math, from the basic to the baffling.
His January 31 column, "From Fish to Infinity," attracted over 500 reader comments.