He has contributed to the fields of mathematical economics , game theory , and convex analysis .
He was a professor emeritus at the University of California , Berkeley , affiliated with the departments of mathematics , economics , and industrial engineering and operations research .
professor emeritus has contributed to the fields of mathematical economics , game theory , and convex analysis .
He was a professor emeritus at the University of California , Berkeley , affiliated with the departments of mathematics , economics , and industrial engineering and operations research .