Jacques Riguet (1921 to October 20, 2013) was a French mathematician known for his contributions to algebraic logic and category theory.
According to Gunther Schmidt and Thomas Ströhlein, "Alfred Tarski and Jacques Riguet founded the modern calculus of relations".
He studied Louis Couturat and Bourbaki, who made contributions to logic and set theory.
In 1954 Riguet gave a plenary address at the International Congress of Mathematicians in Amsterdam, speaking on the applications of binary relations to algebra and machine theory.
[7] The following year he provided an algebraic characterization of heterogeneous relations with a logical matrix comparable to a Ferrers diagram.