In this paper we prove that the social equilibrium set, of an exchange economy, with consumption space as a subset of a Banach space in a Banach manifold, and this Characterization does not depend on the number of commodities. In the way to obtain this characterization we will show that the set...

In the framework of the general equilibrium theory, we introduce an evolutionary model for an economy with production. This will try to explain the possibility of the emergence of unexpected and unpredictable changes (economic crisis), in the economy as a result of the action, under imperfect...