Alain Connes is a mathematician, professor at the Collège de France and chair of Analysis and Geometry, member of the Académie des Sciences and several foreign academies including the National Academy of Science in the US. He was awarded the Fields Medal in 1982. He has published several book with Odile Jacob.
Patrick Gauthier-Lafaye is a psychiatrist and psychoanalyst. He practices in Strasbourg. He is the author of Conversations psychoanalytiques and L’Expérience de l’inconscient, among others.

“This little book aims to show how the mathematical concept of topos, introduced by Alexandre Grothendieck at the end of the 1950s, can be applied to the exploration of the structure of the unconscious, in the same vein as Jacques Lacan’s attempts to scientise psychoanalysis during the same period. Readers are introduced to the mathematical notion of topos and explore, alongside Alain Connes and Patrick Gauthier-Lafaye, in the shadow of Grothendieck and Lacan, how sophisticated conceptual tools, provided by the advances of mathematical theory, can help build a fertile model of the structure of the individual unconscious, in relation to language, time and myths.” A.C & P.G-L.