20th-century American mathematicians

Alice Jeanne LaDuke (born June 27, 1938) is an American mathematician who specialized in mathematical analysis and the history of mathematics. She was also a child actress who appeared in one film (The Green Promise).

John Charles Chenoweth McKinsey (30 April 1908 – 26 October 1953), usually cited as J. C. C. McKinsey, was an American mathematician known for his work on game theory and mathematical logic, particularly, modal logic.

Robert Leo Prestel (born February 11, 1936) is an American intelligence official and mathematician who was Deputy Director of the National Security Agency from 1990 to 1994, during which time he was the highest ranking civilian in the agency. Prestel joined the NSA in 1962 and held many positions prior to being appointed as deputy director, including Director of Education and Training from Deputy Director for Research and Engineering. Among other positions Prestel has served in include trustee for the Institute for Defense Analyses and on the Board of Directors of WJ Communications. He currently serves as trustee emeritus of Institute for Defense Analyses.Awards Prestel has received for his service to the intelligence community include the President's Distinguished Executive Award in 1988; the Department of Defense Distinguished Civilian Service Award in 1988; and the National Intelligence Distinguished Service Medal in 1991.

Alfred Theodor Brauer (April 9, 1894 – December 23, 1985) was a German-American mathematician who did work in number theory. He was born in Charlottenburg, and studied at the University of Berlin. As he served Germany in World War I, even being injured in the war, he was able to keep his position longer than many other Jewish academics who had been forced out after Hitler's rise to power. In 1935 he lost his position and in 1938 he tried to leave Germany, but was not able to until the following year. He initially worked in the Northeast, but in 1942 he settled into a position at the University of North Carolina at Chapel Hill. A good deal of his works, and the Alfred T. Brauer library, would be linked to this university. He occasionally taught at Wake Forest University after he retired from Chapel Hill at 70. He died in North Carolina, aged 91.
He was the brother of the mathematician Richard Brauer, who was the founder of modular representation theory.

Edward Oakley Thorp (born August 14, 1932) is an American mathematics professor, author, hedge fund manager, and blackjack researcher. He pioneered the modern applications of probability theory, including the harnessing of very small correlations for reliable financial gain.
Thorp is the author of Beat the Dealer, which mathematically proved that the house advantage in blackjack could be overcome by card counting. He also developed and applied effective hedge fund techniques in the financial markets, and collaborated with Claude Shannon in creating the first wearable computer.Thorp received his Ph.D. in mathematics from the University of California, Los Angeles in 1958, and worked at the Massachusetts Institute of Technology (MIT) from 1959 to 1961. He was a professor of mathematics from 1961 to 1965 at New Mexico State University, and then joined the University of California, Irvine where he was a professor of mathematics from 1965 to 1977 and a professor of mathematics and finance from 1977 to 1982.

Lida Baker Kittrell Barrett (May 21, 1927 – January 28, 2021) was an American mathematics professor and administrator. She served on many committees and boards and contributed to mathematics, mathematics education, and increasing the participation of members of underrepresented groups in mathematics. She served as president of the Mathematical Association of America (MAA) in 1989 and 1990.

Pierre Euclide Conner (27 June 1932, Houston, Texas – 3 February 2018, New Orleans, Louisiana) was an American mathematician, who worked on algebraic topology and differential topology (especially cobordism theory).
In 1955 Conner received his Ph.D from Princeton University under Donald Spencer with thesis The Green's and Neumann's Problems for Differential Forms on Riemannian Manifolds. He was a post-doctoral fellow from 1955 to 1957 (and again in 1961–1962) at the Institute for Advanced Study. He was in the 1960s a professor at the University of Virginia, where he collaborated with his colleague Edwin E. Floyd, and then in the 1970s a professor at Louisiana State University.
In 2012 he became a fellow of the American Mathematical Society.

Deane Montgomery (September 2, 1909 – March 15, 1992) was an American mathematician specializing in topology who was one of the contributors to the final resolution of Hilbert's fifth problem in the 1950s. He served as president of the American Mathematical Society from 1961 to 1962.
Born in the small town of Weaver, Minnesota, he received his B.S. from Hamline University in St. Paul, MN and his Master's and Ph.D. from the University of Iowa in 1933; his dissertation advisor was Edward Chittenden.In 1941 Montgomery was awarded a Guggenheim Fellowship. In 1988, he was awarded the American Mathematical Society Leroy P. Steele Prize for Lifetime Achievement.
He was a member of the United States National Academy of Sciences, the American Philosophical Society, and of the American Academy of Arts and Sciences.

Andrew Pollard Ogg (born April 9, 1934, Bowling Green, Ohio) is an American mathematician, a professor emeritus of mathematics at the University of California, Berkeley.