the concept of the "weak jump," a generalization of the Halting problem distinct from the usual notion of the Turing jump. She also proved analogues of the Rice and Rice-Shapiro theorems, as well as working on theories of computational complexity theory. Her work was influential with both Soviet and US mathematicians of the period. She co-founded the Association for Women in Mathematics (AWM) in an effort to provide support to other working mothers. In 1978, she won a Fulbright Scholarship, as did her husband, and they spent the year studying in the Philippines. In 1979, Hay was named the acting head of the University of Illinois' mathematics department, becoming the only woman to head a research university's mathematics department. In 1980, she was appointed to the executive board of the AWM and remained in that post until 1987. She was also named as secretary of the Association for Symbolic Logic in 1982. Death and legacy In 1988, Hay had a relapse in her breast cancer but continued to work until her death on 28 October 1989 in Oak Park, Illinois. In 1990 the AWM established the Louise Hay Award for Contributions to Mathematics Education to both honor Hay for her contributions to mathematical logic, her leadership and recognize a woman who had made contributions to mathematics and education. References Bibliography Additional sources Hay, Louise. How I became a mathematician, Newsletter of the Association for Women in Mathematics, 1989 (pp. 8–10). Hughes, Rhonda. Fond Remembrances of Louise Hay, Newsletter of the Association for Women in Mathematics, 1990, (pp. 4–6). External links Louise Hay on agnesscott.edu (Biographies of Women Mathematicians) 1935 births 1989 deaths 20th-century American mathematicians University of Illinois Chicago faculty Swarthmore College alumni Cornell University alumni French people of Polish-Jewish descent Jews who emigrated to escape Nazism French emigrants to the United States French women mathematicians Computability theorists 20th-century women mathematicians Mount Holyoke College faculty 20th-century French women Fulbright alumni