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Two lemmas that changed general equilibrium theory
Monique Florenzano 1
(2009-04)

This short paper published in Games and Economic Behavior (July 2009) "In Memoriam" of David Gale, emphasizes the seminal role played by two lemmas of David Gale in the development of the foundations of General Equilibrium Theory.
1:  Centre d'économie de la Sorbonne (CES)
CNRS : UMR8174 – Université Paris I - Panthéon-Sorbonne
Humanities and Social Sciences/Economies and finances

Mathematics/Functional Analysis
Fixed points – equilibrium – excess demand correspondence – Gale-Nikaido-Devreu lemma – simultaneous optimization approach – Michael selection theorems.
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