Esprit Jouffret

Esprit Jouffret (15 March 1837 – 6 November 1904) was a French artillery officer, insurance actuary and mathematician, author of "Traité élémentaire de géométrie à quatre dimensions" ("Elementary Treatise on the Geometry of Four Dimensions", 1903), a popularization of Henri Poincaré's "Science and Hypothesis" in which Jouffret described hypercubes and other complex polyhedra in four dimensions and projected them onto the two-dimensional page.
Maurice Princet brought "Traite" to artist Pablo Picasso's attention. Picasso's sketchbooks for his 1907 painting "Les Demoiselles d'Avignon" illustrate Jouffret's influence on the artist's work.