ABSTRACT
Structure is topological, multidimensional, and spatial. The meaning of structure in Lacan is the most important treated aspects of his teaching. For Lacan, structure expresses relations of one thing to another. Lacan mirror stage is one of the best known of his structures. What is not generally considered is that the mirror stage is a topological structuration of a logical moment in transition from the notion of the infantile to that of structure. In the Ecrits where Lacan takes up the topic of structure and the subject in response to the paper given by Daniel Lagache, he points out that "structure" constitutes the key word of Lagache's paper. Lagache's theory is based on an economico-dynamic point of view, including the organic material and its interpretation from which structure supposedly insinuates itself into people experience. The id is created in the present time of synchrony while its indestructibility appears in the historical repetition of the moments of its own structuration.
