Gerhard Ringel: Difference between revisions
add doctoral advisors |
add requested reference (Ringel as POW in USSR) |
||
| Line 4: | Line 4: | ||
'''Gerhard Ringel''' (October 28, 1919 in [[Bad Pirawarth|Kollnbrunn]], [[First Austrian Republic|Austria]] – June 24, 2008 in [[Santa Cruz, California]]) was a German [[mathematician]]. He was one of the pioneers in [[graph theory]] and contributed significantly to the proof of the [[Heawood conjecture]] (now the [[Ringel-Youngs theorem]]), a mathematical problem closely linked with the [[Four color theorem|Four Color Theorem]]. |
'''Gerhard Ringel''' (October 28, 1919 in [[Bad Pirawarth|Kollnbrunn]], [[First Austrian Republic|Austria]] – June 24, 2008 in [[Santa Cruz, California]]) was a German [[mathematician]]. He was one of the pioneers in [[graph theory]] and contributed significantly to the proof of the [[Heawood conjecture]] (now the [[Ringel-Youngs theorem]]), a mathematical problem closely linked with the [[Four color theorem|Four Color Theorem]]. |
||
Although born in Kollnbrunn, Ringel was raised in [[Czechoslovakia]] and attended [[Charles University]] before being drafted into the [[Wehrmacht]] in 1940 (after Germany had taken control of much of what had been Czechoslovakia). After the war Ringel served for over four years in a [[Soviet Union|Soviet]] prisoner of war camp.{{ |
Although born in Kollnbrunn, Ringel was raised in [[Czechoslovakia]] and attended [[Charles University]] before being drafted into the [[Wehrmacht]] in 1940 (after Germany had taken control of much of what had been Czechoslovakia). After the war Ringel served for over four years in a [[Soviet Union|Soviet]] prisoner of war camp.<ref>{{cite book | editor-last=Bodendiek | editor-first=Rainer | editor-last2=Henn | editor-first2=Rudolf | title=Topics in Combinatorics and Graph Theory. Essays in Honour of Gerhard Ringel | publisher=Physica-Verlag HD | publication-place=Heidelberg | year=1990 | isbn=978-3-642-46910-7 | doi=10.1007/978-3-642-46908-4|url=https://link.springer.com/content/pdf/bfm%3A978-3-642-46908-4%2F1.pdf | mr=1100014}}</ref> |
||
He earned his [[Ph.D.]] from the [[University of Bonn]] in 1951 with a thesis written under the supervision of [[Emanuel Sperner]] and [[Ernst Peschl]].<ref>{{MathGenealogy |id=11109}}</ref> Ringel started his academic career as professor at the [[Free University Berlin]]. In 1970 he left Germany due to bureaucratic consequences of the [[German student movement]], and continued his career at the [[University of California, Santa Cruz]], having been invited there by his coauthor, [[John William Theodore Youngs|John W. T. (Ted) Youngs]]. He was awarded honorary doctorate degrees from the [[Karlsruhe Institute of Technology]] and the [[Free University of Berlin]]. |
He earned his [[Ph.D.]] from the [[University of Bonn]] in 1951 with a thesis written under the supervision of [[Emanuel Sperner]] and [[Ernst Peschl]].<ref>{{MathGenealogy |id=11109}}</ref> Ringel started his academic career as professor at the [[Free University Berlin]]. In 1970 he left Germany due to bureaucratic consequences of the [[German student movement]], and continued his career at the [[University of California, Santa Cruz]], having been invited there by his coauthor, [[John William Theodore Youngs|John W. T. (Ted) Youngs]]. He was awarded honorary doctorate degrees from the [[Karlsruhe Institute of Technology]] and the [[Free University of Berlin]]. |
||
Revision as of 04:16, 12 April 2020
Gerhard Ringel (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician. He was one of the pioneers in graph theory and contributed significantly to the proof of the Heawood conjecture (now the Ringel-Youngs theorem), a mathematical problem closely linked with the Four Color Theorem.
Although born in Kollnbrunn, Ringel was raised in Czechoslovakia and attended Charles University before being drafted into the Wehrmacht in 1940 (after Germany had taken control of much of what had been Czechoslovakia). After the war Ringel served for over four years in a Soviet prisoner of war camp.[1]
He earned his Ph.D. from the University of Bonn in 1951 with a thesis written under the supervision of Emanuel Sperner and Ernst Peschl.[2] Ringel started his academic career as professor at the Free University Berlin. In 1970 he left Germany due to bureaucratic consequences of the German student movement, and continued his career at the University of California, Santa Cruz, having been invited there by his coauthor, John W. T. (Ted) Youngs. He was awarded honorary doctorate degrees from the Karlsruhe Institute of Technology and the Free University of Berlin.
Besides his mathematical skills he was a widely acknowledged entomologist. His main emphasis lay on collecting and breeding butterflies. Prior to his death, he gave his outstanding collection of butterflies to the UCSC Museum of Natural History Collections.[3]
Publications
- Ringel, Gerhard; Youngs, J.W.T. (1968). "Solution of the Heawood map-coloring problem". Proc. Natl. Acad. Sci. USA. 60 (2): 438–445. doi:10.1073/pnas.60.2.438. MR 0228378. PMC 225066. PMID 16591648.
- Ringel, Gerhard (1974). Map Color Theorem. New York/Berlin: Springer-Verlag.[4]
- Hartsfield, Nora; Ringel, Gerhard (1990). Pearls in graph theory. Academic Press, Boston, MA. ISBN 0-12-328552-6.
References
- ^ Bodendiek, Rainer; Henn, Rudolf, eds. (1990). Topics in Combinatorics and Graph Theory. Essays in Honour of Gerhard Ringel (PDF). Heidelberg: Physica-Verlag HD. doi:10.1007/978-3-642-46908-4. ISBN 978-3-642-46910-7. MR 1100014.
- ^ Gerhard Ringel at the Mathematics Genealogy Project
- ^ Retired mathematics professor Gerhard Ringel gives his world-class butterfly collection to UCSC Archived 2012-03-05 at the Wayback Machine, UC Santa Cruz Review, Fall 2006
- ^ Kleitman, Daniel (1975). "Review: Map color theorem by Gerhard Ringel" (PDF). Bull. Amer. Math. Soc. 81 (4): 657–660. doi:10.1090/s0002-9904-1975-13811-0.
External links
- Gerhard Ringel in the German National Library catalogue
| International | |
|---|---|
| National | |
| Academics | |
| People | |
| Other | |
   | This article about an American mathematician is a stub. You can help Wikipedia by expanding it. |
- 1919 births
- 2008 deaths
- People from Gänserndorf District
- 20th-century American mathematicians
- 21st-century American mathematicians
- 20th-century German mathematicians
- 21st-century German mathematicians
- Graph theorists
- University of Bonn alumni
- Free University of Berlin faculty
- University of California, Santa Cruz faculty
- Charles University in Prague alumni
- German emigrants to the United States
- American mathematician stubs