Joseph_Lehner
Joseph Lehner
American mathematician
Joseph Lehner (29 October 1912, New York City – 5 August 2013, Haverford, PA) was a mathematician at Michigan State University (1957–1963), the University of Maryland (1963–1972), and the University of Pittsburgh (1972–1980). He worked on automorphic functions and introduced Atkin–Lehner theory.