Alfred Horn

Alfred Horn
Alfred Horn about 1973
Born	(1918-02-17)February 17, 1918 Lower East Side, Manhattan, U.S.
Died	April 16, 2001(2001-04-16) (aged 83) Pacific Palisades, Los Angeles, U.S.
Known for	Horn clause
Academic background
Education	City College of New York (BS), New York University (MS), University of California, Berkeley (PhD)
Thesis	On sentences which are true of direct unions of algebras (1951; 73 years ago (1951))
Academic work
Discipline	Mathematician, Logician
Main interests	Lattice theory, Universal algebra

Alfred Horn (February 17, 1918 – April 16, 2001) was an American mathematician notable for his work in lattice theory and universal algebra. His 1951 paper "On sentences which are true of direct unions of algebras" described Horn clauses and Horn sentences, which later would form the foundation of logic programming.