Date: Jan 25, 2013 6:54 PM Author: Daron Subject: What is the earliest mention of dual polyhedra? I am doing a project on the history of polyhedra in mathematics. I know that the notion of a dual polyhedron was not formalized fully until Bruckner in 1900, and that The Classification of Catalan Solids makes some use of duals. I know it can't make very liberal use of duals, since if it did the result would be trivial (Catalan Solids are dual to Archimedean) And the paper is in French so I can't read it.