Joseph Lehner
Joseph Lehner (October 29, 1912, New York City – August 5, 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. Provided by Wikipedia-
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