Perturbation Methods Using Backward Error

Robert M. Corless is emeritus distinguished university professor at Western University, a member of the Rotman Institute of Philosophy, former scientific director of The Ontario Research Center for Computer Algebra, and an adjunct professor at the Cheriton School of Computer Science, the University of Waterloo. He is the editor-in-chief of Maple Transactions. In 2019 he was awarded the Ford-Halmos Prize, along with the late Jonathan Borwein, for expository excellence for the paper Gamma and Factorial in the Monthly.Nicolas Fillion is an associate professor of philosophy at Simon Fraser University. His main research contributions are in the philosophy of science and applied mathematics, but his research and teaching include the history of logic, mathematics, and science, formal logic, decision and game theory, critical thinking, philosophy of language, ancient Greek philosophy, and epistemology broadly construed. In 2019 he was awarded the Cormack Award for Excellence in Teaching.