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- Gerhard_Ringel abstract "Gerhard Ringel (October 28, 1919, in Kollnbrunn, Austria – June 24, 2008, in Santa Cruz, California) was an Austrian mathematician who earned his Ph.D. from the University of Bonn in 1951. 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 German Army 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.Gerhard 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, Professor John W. T. (Ted) Youngs. He was awarded honorary doctors degrees from the University of Karlsruhe (TH) and the Free University 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.".
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- Gerhard_Ringel wikiPageExternalLink Pearls_in_Graph_Theory.html?id=R6pq0fbQG0QC.
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- Gerhard_Ringel wikiPageWikiLink Austria.
- Gerhard_Ringel wikiPageWikiLink Bad_Pirawarth.
- Gerhard_Ringel wikiPageWikiLink Category:1919_births.
- Gerhard_Ringel wikiPageWikiLink Category:2008_deaths.
- Gerhard_Ringel wikiPageWikiLink Category:20th-century_American_mathematicians.
- Gerhard_Ringel wikiPageWikiLink Category:20th-century_German_mathematicians.
- Gerhard_Ringel wikiPageWikiLink Category:21st-century_American_mathematicians.
- Gerhard_Ringel wikiPageWikiLink Category:21st-century_German_mathematicians.
- Gerhard_Ringel wikiPageWikiLink Category:Charles_University_in_Prague_alumni.
- Gerhard_Ringel wikiPageWikiLink Category:Free_University_of_Berlin_faculty.
- Gerhard_Ringel wikiPageWikiLink Category:German_emigrants_to_the_United_States.
- Gerhard_Ringel wikiPageWikiLink Category:Graph_theorists.
- Gerhard_Ringel wikiPageWikiLink Category:People_from_Gänserndorf_District.
- Gerhard_Ringel wikiPageWikiLink Category:University_of_Bonn_alumni.
- Gerhard_Ringel wikiPageWikiLink Category:University_of_California,_Santa_Cruz_faculty.
- Gerhard_Ringel wikiPageWikiLink Charles_University_in_Prague.
- Gerhard_Ringel wikiPageWikiLink Entomology.
- Gerhard_Ringel wikiPageWikiLink First_Austrian_Republic.
- Gerhard_Ringel wikiPageWikiLink Four_color_theorem.
- Gerhard_Ringel wikiPageWikiLink Free_University_of_Berlin.
- Gerhard_Ringel wikiPageWikiLink German_student_movement.
- Gerhard_Ringel wikiPageWikiLink Graph_theory.
- Gerhard_Ringel wikiPageWikiLink Heawood_conjecture.
- Gerhard_Ringel wikiPageWikiLink John_William_Theodore_Youngs.
- Gerhard_Ringel wikiPageWikiLink Karlsruhe_Institute_of_Technology.
- Gerhard_Ringel wikiPageWikiLink Mathematician.
- Gerhard_Ringel wikiPageWikiLink Santa_Cruz,_California.
- Gerhard_Ringel wikiPageWikiLink University_of_Bonn.
- Gerhard_Ringel wikiPageWikiLink University_of_California,_Santa_Cruz.
- Gerhard_Ringel wikiPageWikiLink File:Gerhard_Ringel_surfing.jpg.
- Gerhard_Ringel wikiPageWikiLinkText "Dr. Gerhard Ringel".
- Gerhard_Ringel wikiPageWikiLinkText "Gerhard Ringel".
- Gerhard_Ringel wikiPageWikiLinkText "Ringel".
- Gerhard_Ringel wikiPageWikiLinkText "Ringel, Gerhard".
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- Gerhard_Ringel subject Category:1919_births.
- Gerhard_Ringel subject Category:2008_deaths.
- Gerhard_Ringel subject Category:20th-century_American_mathematicians.
- Gerhard_Ringel subject Category:20th-century_German_mathematicians.
- Gerhard_Ringel subject Category:21st-century_American_mathematicians.
- Gerhard_Ringel subject Category:21st-century_German_mathematicians.
- Gerhard_Ringel subject Category:Charles_University_in_Prague_alumni.
- Gerhard_Ringel subject Category:Free_University_of_Berlin_faculty.
- Gerhard_Ringel subject Category:German_emigrants_to_the_United_States.
- Gerhard_Ringel subject Category:Graph_theorists.
- Gerhard_Ringel subject Category:People_from_Gänserndorf_District.
- Gerhard_Ringel subject Category:University_of_Bonn_alumni.
- Gerhard_Ringel subject Category:University_of_California,_Santa_Cruz_faculty.
- Gerhard_Ringel hypernym Mathematician.
- Gerhard_Ringel type Person.
- Gerhard_Ringel type Scientist.
- Gerhard_Ringel type Combinatorialist.
- Gerhard_Ringel type Mathematician.
- Gerhard_Ringel type Scholar.
- Gerhard_Ringel type Scientist.
- Gerhard_Ringel type Thing.
- Gerhard_Ringel comment "Gerhard Ringel (October 28, 1919, in Kollnbrunn, Austria – June 24, 2008, in Santa Cruz, California) was an Austrian mathematician who earned his Ph.D. from the University of Bonn in 1951.".
- Gerhard_Ringel label "Gerhard Ringel".
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- Gerhard_Ringel depiction Gerhard_Ringel_surfing.jpg.
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