Nicolas Bouleau is a mathematician, philosopher of science and essayist, professor at Ecole des Ponts Paris Tech. He was responsible for introducing computer simulation into the teaching of probability and was among the first to develop research in mathematical finance in France. In 1984 he created a research team in applied mathematics which became a CNRS unit (40 researchers). Since 1992 he has taught Master of Probability at the University of Paris. He has supervised sixteen theses, published more than hundred articles on potential- and probability theory, also philosophical and epistemological essays. His ten books include "Dirichlet Forms and Analysis on Wiener Space" with F. Hirsch (De Gruyter 1991), "Numerical Methods for Stochastic Processes" with D. Lépingle (Wiley 1994), and "Error Calculus for Finance and Physics" (De Gruyter, 2003). Nicolas Bouleau has lectured at over one hundred international conferences, was awarded the Montyon Prize of the French Academy of Sciences.