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. Provided by Wikipedia