In geometry, Cavalieri's principle, a modern implementation of the methodofindivisibles, named after Bonaventura Cavalieri, is as follows: 2-dimensional
Memoirs of the Royal Academy, 1693, observes that the methodof transforming figures, explained at the latter end of Roberval's Treatise ofIndivisibles, was
Cavalieri's principle, also termed the methodofindivisibles which eventually evolved into the infinitesimal calculus of Roberval, Torricelli, Wallis, Leibniz
librarian at the Library of Alexandria, and contains the first attested explicit use ofindivisibles (indivisibles are geometric versions of infinitesimals).