Edgar Lorch

Edgar Raymond Lorch (July 22, 1907 – March 5, 1990) was a Swiss American mathematician. Described by ''The New York Times'' as "a leader in the development of modern mathematics theory", he was a professor of mathematics at Columbia University. He contributed to the fields general topology, especially metrizable and Baire spaces, group theory of permutation groups and functional analysis, especially spectral theory, convexity in Hilbert spaces and normed rings. Provided by Wikipedia