Leon Ehrenpreis [SEP] occupation
Leon Ehrenpreis
Eliezer 'Leon' Ehrenpreis (May 22, 1930 – August 16, 2010, Brooklyn) was a mathematician at Temple University who proved the Malgrange–Ehrenpreis theorem, the fundamental theorem about differential operators with constant coefficients.
Ehrenpreis was one of Claude Chevalley's students at Columbia University.
Religion.
Ehrenpreis was also a Rabbi, having received his ordination from the renowned Rabbi Moshe Feinstein. He was the author of a work on the Chumash and other religious topics, currently in manuscript.
Miscellaneous
Ehrenpreis conjecture
In mathematics, the Ehrenpreis conjecture of Leon Ehrenpreis states that for any "K" greater than 1, any two closed Riemann surfaces of genus at least 2 have finite-degree covers which are "K"-quasiconformal: that is, the covers are arbitrarily close in the Teichmüller metric.
A proof was announced by Jeremy Kahn and Vladimir Markovic in January 2011, using their proof of the Surface subgroup conjecture  and a newly developed "good pants homology" theory. In June 2012, Kahn and Markovic were given