Leon Henkin

Leon Albert Henkin was an American logician, whose works played a strong role in the development of logic, particularly in the theory of types. He was an active scholar at the University of California, Berkeley, where he made great contributions as a researcher, teacher, as well as in administrative positions. At this university he directed, together with Alfred Tarski, the Group in Logic and the Methodology of Science, from which many important logicians and philosophers emerged. He had a strong sense of social commitment and was a passionate defender of his pacifist and progressive ideas. He took part in many social projects aimed at teaching mathematics, as well as projects aimed at supporting women's and minority groups to pursue careers in mathematics and related fields. A lover of dance and literature, he appreciated life in all its facets: art, culture, science and, above all, the warmth of human relations. He is remembered by his students for his great kindness, as well as for his academic and teaching excellence.

19 April 1921

Born on the same birth date (19 April 1921): Anna Lee Aldred • Roberto Tucci

Born on the same birth day (19 April): Azlan Shah of Perak • Clay Shaw (politician) • Germaine Tailleferre • Glenn T. Seaborg • Jack Pardee • James Heckman • James Nares (composer) • Johann Wilhelm, Elector Palatine • Julien Ries • Roger Sherman • Sir John Hobart, 2nd Baronet • Tim Curry

Born in the same month (April 1921): Arthur "Guitar Boogie" Smith • Cleto Bellucci • Feza Gürsey • Frankie Thomas • Jack Rayner • Jean Richard (actor) • Jean-Marie Balestre • Judy Agnew • Peter Ustinov • Robert Cliche • Sheb Wooley • Thomas Schelling • Warren Spahn • William Bergsma