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 finality come from ? Is it central, peripherical, as it were interlocked ? Functional and territorial logics demand a new regulation : Decentralized planning. However, is this space collectively rooted in local mentalities, even if Public Economics are used as a means to achieve this purpose ? Thus, with a finality and a geometry, through all its modalities, this space becomes the theorical entity of a possible General theory.