History of mathematics
Lacan advocated a triple formation for the psychoanalysts: the linguistics, the history and the mathematics. The passionate history of this last discipline reveals the advanced successive of a logical symbolization in an imaginary field
(the geometry), but also its points of stopping. The dimension of Real disengages of it constantly, and lets to appear the fashions of contour, the logic holes to avoid, that were formulated progressively by the mathematicians.