Stanley Tennenbaum

{{short description|American mathematician}}

Stanley Tennenbaum (April 11, 1927 – May 4, 2005) was an American mathematician who contributed to the field of logic.{{cite web |url=http://mamls.org/Tennenbaum/People/StanleyTennenbaum |title=A conference in memory of Stanley Tennenbaum |publisher=mamls.org}} In 1959, he published Tennenbaum's theorem, which states that no countable nonstandard model of Peano arithmetic (PA) can be recursive, i.e. the operations + and × of a nonstandard model of PA are not recursively definable in the + and × operations of the standard model.{{cite journal | author=Stanley Tennenbaum | title=Non-archimedean models for arithmetic | journal=Notices of the American Mathematical Society | volume=6 | pages=270 | year=1959 }} He was a professor at Yeshiva University in the 1960s.