Bio/Description Weinan E transferred to emeritus status on July 1, 2022 after nearly twenty-five years at Princeton and over thirty years in the field of mathematics. His research has focused on applied mathematics, the mathematical theory of machine learning, and integrating machine learning with multi-scale modeling, and he has made significant contributions in these areas. He has been praised for his “breakthrough contributions in various fields of applied mathematics and scientific computing, particularly in nonlinear stochastic (partial) differential equations, computational fluid dynamics, computational chemistry, and machine learning,” as described by the Peter Henrici Prize selection committee. His work has led to the resolutions of many long-standing mathematical problems. In addition to his research, Weinan has advised more than thirty-five graduate students and postdocs over the course of his career, with a unique approach to the exposition of machine learning. Former students laud his lectures as being extremely interesting and well-taught, including one who described him as a “true gem at Princeton and perhaps all of the USA,” adding, “Princeton is lucky to have Professor E.” Weinan was born in Jingjiang, China, in 1963. After earning his undergraduate degree from the University of Science and Technology of China in 1982 and his master’s degree from the Chinese Academy of Sciences in 1985, he went on to pursue his Ph.D. in mathematics at the University of California-Los Angeles, which he completed in 1989. To begin his professional career, Weinan became a visiting member at New York University’s Courant Institute. After two years in that role, he went on to spend four years at the Institute for Advanced Study before returning to NYU as an associate professor. He later accepted a full professorship at NYU. Additionally, Weinan was a visiting professor at the Center for Machine Learning Research and the School of Mathematical Sciences at Peking University from 2000 through 2019. Weinan joined Princeton’s Department of Mathematics and Program in Applied and Computational Mathematics as a professor in 1999. Throughout his career, his work has garnered many awards, among them the Presidential Early Career Award in Science and Engineering (1996), the ICIAM Collatz Prize (2003), the Theodore von Kármán Prize (2014), and the Peter Henrici Prize (2019). He is a fellow of the Institute of Physics, the Society for Industrial and Applied Mathematics, and the American Mathematical Society, and he is a member of the Chinese Academy of Sciences. His contributions to the mathematical community, as well as Princeton University, will have a longstanding impact on future generations of mathematicians. Written by members of the Department of Mathematics faculty.