From Princeton University, Office of Communications (2014):
Princeton University mathematician and professor emeritus Edward Nelson, whose contributions to analysis, probability and mathematical logic advanced all of those subjects and inspired much further research, died Sept. 10 in Princeton due to complications from lymphoma. He was 82. Known for his characteristic pipe and use of props during lectures, Nelson is remembered as a patient and courteous intellectual who relentlessly pursued answers to his questions—even if those answers defied convention. . . . Accomplished in many areas of mathematics, Nelson is especially well known for his successful application of probability to quantum field theory, work for which he received the American Mathematical Society’s Steele Prize for Seminal Contribution to Research in 1995.