 Orthogonals, diagonals, and curves became autonomous subjects and in themselves created "effective surprises" ("Dal quadrato al cerchio", 1974, "Cinque quadrate in un quadrato", 1973).In 1973 he held the chair of Theory of Perception at the Accademia Albertina in Turin.His works were shown by Daniela Palazzoli and Luigi Carluccio at the exhibition "Combattimenti per una imagine" at the Modern Art Gallery of Turin.