Henry Otto Pollak (December 13, 1927) is an Austrian-American mathematician, known for his contributions to information theory.
Born in Vienna, Austria, he since moved to USA. While at Yale University for his B.Sc. in mathematics (1947) he participated on silver-award winning teams with celebrated mathematicians as Murray Gell-Mann and Murray Gerstenhaber. He earned an M.A. and Ph.D. (1951) degree in mathematics from Harvard University, the latter on the thesis Some Estimates for Extremal Distance advised by Lars Ahlfors.
Pollak then joined Bell Labs (1951), where he in the early 1960s became director of the Mathematics and Statistics Research Center. He authored near forty papers, many of these with David Slepian and Henry Landau on analysis, function theory, probability theory, and mathematics education. He has applied mathematics to solve problems in physics and networks, communication theory, discrete systems, statistics and data analysis, and economic analysis. Pollak also holds patents in the area of signalling.[1] He has held teaching positions in the mathematics department at Columbia University.