Cesare Burali-Forti (1861–1931) taught at the Military Academy in Turin. He discovered a paradox in Cantor’s {see planet (16246)} set theory: since the ordinal number of a set of ordinals is greater than the ordinal of each set element, “the ordinal of the set of all ordinals” is a self-contradictory concept. (M 41943) _ _.
Discovered on 6-3-1999 in Prescott by Comba, P. G.