Vocation : Science : Mathematics/ Statistics

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.

Konrad Hermann Theodor Knopp (22 July 1882 – 20 April 1957) was a German mathematician who worked on generalized limits and complex functions.

Ernst Erich Jacobsthal (16 October 1882, Berlin – 6 February 1965, Überlingen) was a German mathematician, and brother to the archaeologist Paul Jacobsthal.
In 1906, he earned his PhD at the University of Berlin, where he was a student of Georg Frobenius, Hermann Schwarz and Issai Schur; his dissertation, Anwendung einer Formel aus der Theorie der quadratischen Reste (Application of a Formula from the Theory of Quadratic Residues), provided a proof that prime numbers of the form 4n + 1 are the sum of two square numbers. In 1934, he was fired from his professorship at the Technische Hochschule Berlin, because of his Jewish origins. In 1939 he fled to Norway and became after the war a professor at the Norwegian Institute of Technology in Trondheim.

Hans Ludwig Hamburger (5 August 1889, Berlin – 14 August 1956, Cologne) was a German mathematician. He was a professor at universities in Berlin, Cologne and Ankara.

Erich Bessel-Hagen (12 September 1898 in Charlottenburg – 29 March 1946 in Bonn) was a German mathematician and a historian of mathematics.Erich Paul Werner Bessel-Hagen was born in 1898 in Charlottenburg, a suburb, later a district in Berlin. He studied at the University of Berlin where in 1920 he obtained a Ph.D. in mathematics under the direction of Constantin Carathéodory.
His reputation was that of a gentleman as well as a conscientious intellect. This was averred in the early 1940s, when the ruling Nazis increased their persecutions of German officials who have Jewish ancestry. After Felix Hausdorff (a professor 30 years his senior) had been retired and placed under restrictions, Bessel-Hagen became the only former colleague who visited him regularly. On noticing that Hausdorff used private math researches to while away time, he started bringing him books he had borrowed from a library which no longer welcomed Jews.

Taylor Drysdale (January 14, 1914 – February 9, 1997) was an American competition swimmer and swimming coach. Drysdale represented the United States at the 1936 Summer Olympics in Berlin, Germany. He competed in the men's 100-meter backstroke, and finished fourth in the event final with a time of 1:09.4.Drysdale attended the University of Michigan, where he was a member of the Michigan Wolverines swimming and diving team in National Collegiate Athletic Association (NCAA) competition from 1932 to 1935. During his college swimming career, he won three individual NCAA national championships in the 150-yard backstroke (1932, 1934, 1935), and was also a member of Michigan's NCAA-winning teams in the 300-yard medley relay (1932, 1935) and 400-yard freestyle relay (1935).He later earned master's degrees in nuclear physics and mathematics from the University of Michigan, joined the U.S. military, worked on the Manhattan Project, and retired from the U.S. Air Force as a colonel. He was also the manager of the 1956 U.S. Olympic swim team.Drysdale was inducted into the International Swimming Hall of Fame as an "Honor Pioneer Swimmer" in 1994. He died in 1997; he was 83 years old.

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.