Louise Hay (mathematician)

Louise Hay
Louise Hay in December 1986
Born	Louise Szmir (1935-06-14)June 14, 1935 Metz, Lorraine, France
Died	28 October 1989(1989-10-28) (aged 54) Oak Park, Illinois
Nationality	American
Other names	Louise Schmir Hay Louise Larson
Occupation	Mathematician
Years active	1960–1989
Spouses	John Hay ​ ​ (m. 1955; div. 1968)​ Richard Larson ​ (m. 1970)​

Louise Hay (June 14, 1935 – October 28, 1989) was a French-born American mathematician. Her work focused on recursively enumerable sets and computational complexity theory, which was influential with both Soviet and US mathematicians in the 1970s. When she was appointed head of the mathematics department at the University of Illinois at Chicago, she was the only woman to head a math department at a major research university in her era.