Gérard Debreu, 1921-2004, was a French economist, mathematician and Professor of Economics at the University of California, Berkley. He was the winner of the *Nobel Prize in Economic Sciences* in 1983, for including new analytical methods into economic theory and for his contributions to the *general equilibrium theory*.

Along with Kenneth Arrow he published the way-out paper, “Existence of an Equilibrium for a Competitive Economy”, 1954, in which, using mathematical analysis, he demonstrated the existence of a general equilibrium.

Debreu is also the author of the book “Theory of Value: An Axiomatic Analysis of Economic Equilibrium”, 1959, where, using modern mathematics, he exposes a synthesis model of the market economy, based on the variables of price and the expressive equations from the different markets, and that relate in an efficient and coordinated way.