Paolo Ruffini made significant contributions in the areas of medicine and philosophy, as well as mathematics, where he developed the theory that a quintic equation cannot be solved by radicals. This theory later came to be known as the Abel-Ruffini...

1765-1822 Italian Mathematician and Physician The Abel-Ruffini theorem states that quintic equations, or algebraic equations greater than the fourth degree, cannot be solved using only radicals—i.e., square roots, cube roots, and other roots. It...

1765-1822 Italian mathematician and physician who was the first to prove that quintic equations (equations in which one term is raised to the fifth power) cannot be solved using only radicals (square roots). This important proof, which flew in the face...

Paolo Ruffini (september 22, 1765 – May 9, 1822) was an Italian mathematician and philosopher. Among his work was an incomplete proof that quintic (and higher-order) equations cannot be solved by radicals and Ruffini's rule, a quick method for...

Gianfranco Ruffini, Inc., Receives License to Make Ruffini Activewear Gianfranco Ruffini, Inc., maker of the Gianfranco Ruffini men's wear collection, has added the license for the Ruffini Sport men's and boys' activewear lines. All three lines will be sold out of the...

NEW YORK -- The Gianfranco Ruffini division of cluett, Peabody & Co., Inc., has been acquired by Gianfranco Ruffini, Inc., for an undisclosed purchase price. The acquisition was disclosed in a joint statement made by Sam Barkin, president of Gianfranco Ruffini, Inc., and...