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WILCZYNSKI, ERNEST JULIUS:

American mathematician; born in Hamburg, Germany, Nov. 13, 1876. He went with his parents in 1885 to America, where he attended the Chicago high school. Returning to Germany in 1893, he studied astronomy and mathematics at the University of Berlin (Ph.D. 1897; thesis, "Hydrodynamische Untersuchungen mit Anwendungen auf die Theorie der Sonnenrotation"). In 1898 he became computer at the Nautical Almanac Office, Washington, D. C., and then instructor in mathematics successively at Columbian University Summer School there and at the University of California, being appointed assistant professor at the latter institution in 1902. From 1903 to 1905 he was absent on leave in Europe as research associate of the Carnegie Institution at Washington. Besides a large number of articles in mathematical and astronomical journals, he has published "Projective Differential Geometry of Curves and Ruled Surfaces," Leipsic, 1905.

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