Is urban space, as a concentric agglomeration in expansion, in contraction, which duplicates itself, the solution of a dierential system ? Does urban geometry come from "chaotic" mutations, from cloning and aggregating districts ? And do they project their metrics on space ? Then where does its...

Canonical analysis of the classical general equilibrium model demonstrates the existence of an open and dense subset of standard economies that possess fully-revealing rational expectations equilibria. This paper shows that the analogous result is not true in urban economies under appropriate...