# GERARD DEBREU THEORY OF VALUE PDF

Biography[ edit ] His father was the business partner of his maternal grandfather in lace manufacturing, a traditional industry in Calais. Debreu was orphaned at an early age, as his father committed suicide and his mother died of natural causes. He was influenced by Henri Cartan and the Bourbaki writers. When he was about to take the final examinations in , the Normandy landings occurred and he, instead, enlisted in the French army. He was transferred for training to Algeria and then served in the occupying French forces in Germany until July From to , he was an assistant in the Centre National de la Recherche Scientifique.

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This is like the notes made when reading mathematics by someone who is trying to figure out the link between the mathematical wisdom and his own problems in mind. Tuples are ordered sets, sets the order of whose elements are essential, thus containing an additional dimension of information Tuples are ordered sets, sets the order of whose elements are essential, thus containing an additional dimension of information.

The graph of a function is also a set, only with a correspondence in between its elements. A projection is a function assciating a point graph with its coordinates, while the association of a coordinate to a point graph containing it is also a function. These functions differ from the other ones in that the image is a product of sets one member of which is the inverse image. The image of a function or a correspondence is the image of a projection function from the graph of the function or correspondence to its component containing the image of the function or correspondence.

An operation is also a correspondence, e. An equation is in the language of set theory a correspondence, yet rather a special one. What is the definition of an equation in connection with a correspondence?

This and the question of what a solution is should be of fundamental importance to the understanding of fixed-point theory which lies in the center of both optimization and equilibrium analysis. If an equation is simply a correspondence, what is a solution? Maybe to say that a solution to a particular equation exists is to say that an element is in the image of that particular correspondence.

It became clear from the comment A relation is a different concept from a correspondence. The presence of an element inside a set is a relation. In a sense a correspondence is also a relation maybe not binary? So is an equation.

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## GERARD DEBREU THEORY OF VALUE PDF

This is like the notes made when reading mathematics by someone who is trying to figure out the link between the mathematical wisdom and his own problems in mind. Tuples are ordered sets, sets the order of whose elements are essential, thus containing an additional dimension of information Tuples are ordered sets, sets the order of whose elements are essential, thus containing an additional dimension of information. The graph of a function is also a set, only with a correspondence in between its elements. A projection is a function assciating a point graph with its coordinates, while the association of a coordinate to a point graph containing it is also a function. These functions differ from the other ones in that the image is a product of sets one member of which is the inverse image. The image of a function or a correspondence is the image of a projection function from the graph of the function or correspondence to its component containing the image of the function or correspondence.

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