Wendell Helms Fleming (March 7, 1928 – February 18, 2023) was an American mathematician, specializing in geometrical analysis and stochastic differential equations.
Fleming received his PhD in 1951 under Laurence Chisholm Young at the University of Wisconsin–Madison with a thesis entitled Boundary and related notions for generalized parametric surfaces.
In 1982 he gave a plenary address (Optimal control of Markov Processes) at the ICM in Warsaw.
In 1987 he received with Federer the Leroy P. Steele Prize of the American Mathematical Society.
[2] In May 2012 his election to membership in the United States National Academy of Sciences was announced.