Leon Ehrenpreis

Leon Ehrenpreis ( May 22nd 1930 in Brooklyn, † August 16, 2010 ) was an American mathematician who worked on Analysis.

Speedwell attended Stuyvesant High School in New York City and studied mathematics at the City College of New York (Bachelor 1950 ) and at Columbia University, where he in 1951 his master's degree made ​​and received his doctorate in 1953 with Claude Chevalley ( Theory of distributions in compact spaces ). As a post - graduate student, he was 1953/54, Instructor at Johns Hopkins University and from 1954 to 1957 at the Institute for Advanced Study. From 1957 he was an associate professor at Brandeis University, and from 1959 at Yeshiva University. 1962 to 1968 he was a professor at the Courant Institute of Mathematical Sciences of New York University and then professor at Yeshiva University. He was at Temple University Professor since 1984.

He dealt with partial differential equations, distributions, automorphic functions, several complex variables and the Radon transform. He is known for the set of Malgrange - Ehrenpreis that differential equations with constant coefficients have a Green's function, proved in 1954 by Bernard Malgrange and Ehrenpreis. In 1960 he announced a sentence that became known as the fundamental principle of Ehrenpreis and Palamodov and the representability of the solutions of systems of polynomial partial differential operators with constant coefficients shows by a generalized Fourier transform.

Speedwell was married since 1961 and had eight children. He took from 1970 to 2007 regularly participates at the New York City Marathon.

Besides his work as a mathematician, he was a Talmudic scholar and rabbi, a disciple of Rabbi Moshe Feinstein (1895-1986), whom he advised until his death in 1986 in scientific matters.

Among his doctoral students include Carlos Berenstein and Carlos J. Moreno.

Writings

• Fourier analysis in several complex variables, Wiley, 1970, Dover 2006
• The universality of the Radon Transform, Oxford, Clarendon Press 2003