Claude Lemaréchal is a French applied mathematician, and former senior researcher at INRIA near Grenoble, France.
Claude Lemaréchal in 2005
Roger Jean-Baptiste Robert Wets is a "pioneer" in stochastic programming and a leader in variational analysis who publishes as Roger J-B Wets. His research, expositions, graduate students, and his collaboration with R. Tyrrell Rockafellar have had a profound influence on optimization theory, computations, and applications. Since 2009, Wets has been a distinguished research professor at the mathematics department of the University of California, Davis.
Wets helped to lead a project on decision-making under uncertainty at the International Institute for Applied Systems Analysis (pictured).
Since 1965 R. Tyrrell Rockafellar (pictured) and Wets have collaborated in stochastic programming, earning the Dantzig prize for their progressive-hedging algorithm and theory of epigraphic convergence.