Ernest J. Wilczynski
Ernest Julius Wilczynski (born November 13, 1876 in Hamburg , † December 14, 1932 in Denver , Colorado ) was an American mathematician .
Wilczynski went to school in Hamburg and Chicago , where his family emigrated. To study mathematics he went to the University of Berlin , where he received his doctorate in 1897 ( hydrodynamic studies with application to the theory of solar rotation ). He heard mathematics in Berlin with Lazarus Fuchs , Alfred Pringsheim , Kurt Hensel , Ludwig Schlesinger , Hermann Amandus Schwarz and physics with Max Planck . On his return to the USA he was at the Nautical Almanac Office in Washington, DC and from 1898 instructor at the University of California, Berkeley , where he became Assistant Professor in 1902 and Associate Professor in 1906. From 1903 to 1905 he was in Europe for the Carnegie Institution , including Italy, where he met his future wife (marriage in 1906). In 1907 he was at the University of Illinois and in 1910 at the University of Chicago , where he received a full professorship in 1914. However, his health deteriorated, so that in 1923 he had to give up his lectures.
Wilczynski first dealt with theoretical astronomy and with mathematical problems of the differential equations that arise. He became known, however, through his work with projective differential geometry. He was a pioneer in this area, although Georges Henri Halphen and Gaston Darboux had already made approaches . Guido Fubini was also active in the field. Wilczynski followed up on Halphen, who mainly dealt with plane and space curves, while Wilczynski developed a theory of ruled surfaces .
In 1906 he was Colloquium Lecturer of the American Mathematical Society (AMS) ( Projective Differential Geometry ). He was Vice President of the AMS and from 1919 a member of the National Academy of Sciences .
Fonts
- Projective differential geometry of curves and ruled surfaces, Leipzig, Teubner 1906, online
- Projective differential geometry of curved surfaces, Parts 1-5, Transactions American Mathematical Society, Volume 8, 1907, pp. 223-260, Volume 9, 1908, pp. 79-120, 293-315, Volume 10, 1909, pp. 176-200, 279-296
Web links
- John J. O'Connor, Edmund F. Robertson : Ernest J. Wilczynski. In: MacTutor History of Mathematics archive .
Individual evidence
| personal data | |
|---|---|
| SURNAME | Wilczynski, Ernest J. |
| ALTERNATIVE NAMES | Wilczynski, Ernest Julius |
| BRIEF DESCRIPTION | American mathematician |
| DATE OF BIRTH | November 13, 1876 |
| PLACE OF BIRTH | Hamburg |
| DATE OF DEATH | December 14, 1932 |
| Place of death | Denver , Colorado |