Gerhard Ringel (nonfiction) - Revision history

Admin at 00:25, 25 June 2019

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	[[Category:Nonfiction (nonfiction)]]		[[Category:Nonfiction (nonfiction)]]
			[[Category:Combinatorialists (nonfiction)]]
	[[Category:Graph theorists (nonfiction)]]		[[Category:Graph theorists (nonfiction)]]
	[[Category:Mathematicians (nonfiction)]]		[[Category:Mathematicians (nonfiction)]]
	[[Category:People (nonfiction)]]		[[Category:People (nonfiction)]]

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	[[File:Gerhard_Ringel_surfing.jpg\|thumb\|Gerhard Ringel surfing.]]'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician who earned his Ph.D. from the University of Bonn in 1951. He was one of the pioneers in [[Graph theory (nonfiction)\|graph theory]] and contributed significantly to the proof of the [[Heawood conjecture (nonfiction)\|Heawood conjecture]] (now the Ringel-Youngs theorem), a mathematical problem closely linked with the [[Four color theorem (nonfiction)\|Four color theorem]].		[[File:Gerhard_Ringel_surfing.jpg\|thumb\|Gerhard Ringel surfing.]]'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician who earned his Ph.D. from the University of Bonn in 1951. He was one of the pioneers in [[Graph theory (nonfiction)\|graph theory]] and contributed significantly to the proof of the [[Heawood conjecture (nonfiction)\|Heawood conjecture]] (now the Ringel-Youngs theorem), a mathematical problem closely linked with the [[Four color theorem (nonfiction)\|Four color theorem]].

			== Biography ==

	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.[citation needed]		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.[citation needed]

Admin at 00:22, 25 June 2019

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	* [[Four color theorem (nonfiction)]]		* [[Four color theorem (nonfiction)]]
	* [[Graph theory (nonfiction)]]		* [[Graph theory (nonfiction)]]
	* [[Nora Hartsfield (nonfiction)]] - mathematician who co-authored work with Ringel
	* [[Heawood conjecture (nonfiction)]]		* [[Heawood conjecture (nonfiction)]]
	* [[Klein bottle (nonfiction)]]		* [[Klein bottle (nonfiction)]]

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	Gerhard served as our Chair for thirteen years and was admired and liked by his colleagues. A memorial service is being planned for the Fall.		Gerhard served as our Chair for thirteen years and was admired and liked by his colleagues. A memorial service is being planned for the Fall.

			https://news.ucsc.edu/2008/06/2314.html

	== In the News ==		== In the News ==

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 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.
 == In the News ==
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 * [[Nora Hartsfield (nonfiction)]] - mathematician who co-authored work with Ringel
 * [[Heawood conjecture (nonfiction)]]
 * [[Mathematician (nonfiction)]]
 * [[Mathematics (nonfiction)]]
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 * [https://en.wikipedia.org/wiki/Gerhard_Ringel Gerhard Ringel] @ Wikipedia
 * [https://books.google.com/books/about/Pearls_in_Graph_Theory.html?id=R6pq0fbQG0QC Pearl in Graph Theory] Nora Hartsfield and Gerhard Ringel
 [[Category:Nonfiction (nonfiction)]]

Admin at 00:02, 25 June 2019

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	* [[Four color theorem (nonfiction)]]		* [[Four color theorem (nonfiction)]]
	* [[Graph theory (nonfiction)]]		* [[Graph theory (nonfiction)]]
			* [[Nora Hartsfield (nonfiction)]] - mathematician who co-authored work with Ringel
	* [[Heawood conjecture (nonfiction)]]		* [[Heawood conjecture (nonfiction)]]
	* [[Mathematician (nonfiction)]]		* [[Mathematician (nonfiction)]]
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	* [https://en.wikipedia.org/wiki/Gerhard_Ringel Gerhard Ringel] @ Wikipedia		* [https://en.wikipedia.org/wiki/Gerhard_Ringel Gerhard Ringel] @ Wikipedia
			* [https://books.google.com/books/about/Pearls_in_Graph_Theory.html?id=R6pq0fbQG0QC Pearl in Graph Theory] Nora Hartsfield and Gerhard Ringel

	[[Category:Nonfiction (nonfiction)]]		[[Category:Nonfiction (nonfiction)]]

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	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.[citation needed]		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.[citation needed]

	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 William Theodore Youngs (nonfiction)\|John W. T. (Ted) Youngs[[.		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 William Theodore Youngs (nonfiction)\|John W. T. (Ted) Youngs]].

	Ringel was awarded honorary doctorate degrees from the University of Karlsruhe (TH) and the Free University Berlin.		Ringel was awarded honorary doctorate degrees from the University of Karlsruhe (TH) and the Free University Berlin.

Admin at 23:51, 24 June 2019

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	[[File:Gerhard_Ringel_surfing.jpg\|thumb\|Gerhard Ringel surfing.]]'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician who earned his Ph.D. from the University of Bonn in 1951. He was one of the pioneers in [[Graph theory (nonfiction)\|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~~.		[[File:Gerhard_Ringel_surfing.jpg\|thumb\|Gerhard Ringel surfing.]]'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician who earned his Ph.D. from the University of Bonn in 1951. He was one of the pioneers in [[Graph theory (nonfiction)\|graph theory]] and contributed significantly to the proof of the [[Heawood conjecture (nonfiction)\|Heawood conjecture]] (now the Ringel-Youngs theorem), a mathematical problem closely linked with the [[Four color theorem (nonfiction)\|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.[citation needed]		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.[citation needed]

	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 doctorate degrees from the University of Karlsruhe (TH) and the Free University Berlin.		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 William Theodore Youngs (nonfiction)\|John W. T. (Ted) Youngs[[.

			Ringel was awarded honorary doctorate 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.		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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	== Nonfiction cross-reference ==		== Nonfiction cross-reference ==

			* [[Four color theorem (nonfiction)]]
	* [[Graph theory (nonfiction)]]		* [[Graph theory (nonfiction)]]
			* [[Heawood conjecture (nonfiction)]]
	* [[Mathematician (nonfiction)]]		* [[Mathematician (nonfiction)]]
	* [[Mathematics (nonfiction)]]		* [[Mathematics (nonfiction)]]
			* [[John William Theodore Youngs (nonfiction)]]

	External links:		External links:

	* [https://en.wikipedia.org/wiki/Gerhard_Ringel Gerhard Ringel] @ Wikipedia		* [https://en.wikipedia.org/wiki/Gerhard_Ringel Gerhard Ringel] @ Wikipedia

	~~Attribution:~~

	[[Category:Nonfiction (nonfiction)]]		[[Category:Nonfiction (nonfiction)]]
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	[[Category:Mathematicians (nonfiction)]]		[[Category:Mathematicians (nonfiction)]]
	[[Category:People (nonfiction)]]		[[Category:People (nonfiction)]]
	~~[[Category:Photographs (nonfiction)]]~~

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-'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German 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.
+[[File:Gerhard_Ringel_surfing.jpg|thumb|Gerhard Ringel surfing.]]'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician who earned his Ph.D. from the University of Bonn in 1951. He was one of the pioneers in [[Graph theory (nonfiction)|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.[citation needed]
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 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.

Admin: Created page with "'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician who earned his Ph.D. from the University..."

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Created page with "'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German mathematician who earned his Ph.D. from the University..."

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'''Gerhard Ringel''' (October 28, 1919 in Kollnbrunn, Austria – June 24, 2008 in Santa Cruz, California) was a German 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.[citation needed]

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 doctorate 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.