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 Austria, 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. He earned his PhD from the University of Bonn in 1951 with a thesis written under the supervision of Emanuel Sperner and Ernst Peschl. 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. (Wikipedia).
Zahlen und Geometrie. Antrittsvorlesung Prof. Peter Scholze
Am dies academicus der Universität Bonn im lfd. Sommersemester 2017 hat Prof. Dr. Peter Scholze (geb. 1987, u. a. Leibniz-Preisträger) seine Antrittsvorlesung gehalten. Peter Scholze ist Hausdorff Chair am Exzellenzcluster Hausdorff Center for Mathematics der Universität Bonn. Weitere Inf
From playlist Peter Scholze
Leibniz-Preise für Bonner Forscher: Peter Scholze und Frank Bradke
Prof. Dr. Peter Scholze vom Hausdorff Center for Mathematics, einem Exzellenzcluster der Universität Bonn, und Prof. Dr. Frank Bradke, der am Deutschen Zentrum für Neurodegenerative Erkrankungen (DZNE) arbeitet und Professor für Neurowissenschaften an der Universität Bonn ist, erhalten für
From playlist Peter Scholze
Der Nürnberger Prozess - Die Verteidigung (7/8) / Hauptkriegsverbrecher-Prozess
Generaloberst, Alfred Jodl, Luise Jodl, Hilfsverteidigerin, Prof. Dr. Franz Exner, Wehrmachtsführungsstab, Feldmarschall, Wilhelm Keitel, Wilhelm Bodewin Johann Gustav Keitel, Befehlshaber, Arbeitspflichtgesetz, Arthur Seyß-Inquart, Reichskommissar, Zwangsarbeit, Judenverfolgung, Deportati
From playlist Der Nürnberger Prozess - Die Verteidigung
"Ehre, Freude, Stolz": Peter Scholze ist zurück in Deutschland
Einen Tag nach seiner Rückkehr von der IMC in Rio des Janeiro traf Fields-Medaillen-Träger Prof. Dr. Peter Scholze die wartenden Journalisten. uni-bonn.tv zeigt hier die Pressekonferenz der Uni Bonn vom 07.08.2018. ' © Universität Bonn / uni-bonn.tv / LENTFER FILMPRODUKTION
From playlist Peter Scholze
Karl Schaffer - Kinesthetic Conundrums - CoM Sept 2021
Karl Schaffer is a dancer/choreographer and mathematician who has co-directed the Dr. Schaffer and Mr. Stern Dance Ensemble with Erik Stern since 1987. Schaffer has written widely on dance and mathematics, and his choreographic work often integrates the two disciplines. His recent concerts
From playlist Celebration of Mind 2021
Der Nürnberger Prozess - Das Urteil (2/9) / Hauptkriegsverbrecher-Prozess
Plädoyer, Robert Jackson, Beweismaterial, der historische Text der Schande und Verderbtheit der 20. Jahrhunderts, Joachim von Ribbentrop, Wilhelm Keitel, Wehrmacht, Ernst Kaltenbrunner, Großinquisitor, Terror, Gefügigkeit, Alfred Rosenberg, Vernichtung des Judentums, Julius Streicher, obsz
From playlist Der Nürnberger Prozess - Das Urteil
Lost World of the Maya (Full Episode) | National Geographic
The Maya - their soaring pyramids, monumental cities and mythical mastery of astronomy and mathematics have captured our imaginations and spurred generations of explorers into the jungles of Central America on a quest to understand them. Lost World of the Maya surveys their dramatic rise t
From playlist News | National Geographic
The Five Color Theorem (without Kempe chains)
Submission for the #SoME2 competition. Most animations were done in manim (https://www.manim.community/), and the 3d images were rendered using svg3d (https://github.com/prideout/svg3d). Proofs: The degree of a vertex or a face is the number of edge incidences (edges that meet a vertex o
From playlist Summer of Math Exposition 2 videos
Muse - Knights of Cydonia (Orchestral Version)
Arrangement and conducted by Tess Ringeling. Performed at the conservatory of Utrecht as part of the bachelor of Music in Education
From playlist Statistical Rethinking 2023 Music
Giovanni Cerulli-Irelli : Quiver Grassmannians of Dynkin type
Abstract: Given a finite-dimensional representation M of a Dynkin quiver Q (which is the orientation of a simply-laced Dynkin diagram) we attach to it the variety of its subrepresentations. This variety is strati ed according to the possible dimension vectors of the subresentations of M. E
From playlist Algebra
The Graceful Tree Conjecture | Famous Math Problems 4 | NJ Wildberger
The Graceful Tree Conjecture, or Ringel-Kotzig conjecture, concerns certain labellings of the vertices of a graph G introduced by A. Rosa in 1967. We introduce some basic terminology of graph theory, give examples of graceful and non-graceful graphs, and discuss evidence for the conjecture
From playlist Famous Math Problems
Wissenschaftsfreiheit – Prof. Ulrich Becker – 70 Jahre Grundgesetz
Prof. Dr. Ulrich Becker, Direktor am Max-Planck-Institut für Sozialrecht und Sozialpolitik, erläuterte im Forum „70 Jahre Grundgesetz: Wissenschaftsfreiheit in Gefahr?“ die Regelung der Wissenschaftsfreiheit im Grundgesetz, historische und europäische Hintergründe, ging aber auch auf poten
From playlist Videos auf Deutsch
Fields-Medaille an Peter Scholze. Eugen Hellmann gratuliert.
Prof. Dr. Peter Scholze vom Hausdorff-Zentrum für Mathematik der Universität Bonn hat die Fields-Medaille erhalten, der „Nobelpreis für Mathematik“, die weltweit höchste Auszeichnung für Mathematiker. Sein Studienfreund aus der gemeinsamen Bonner Zeit, Eugen Hellmann, selbst heute Mathemat
From playlist Peter Scholze
Widerstand - Kampf gegen Hitler, Teil 4: Zivilcourage
Thema sind Einzelpersonen und kleine Gruppen, die auf ganz verschiedene Weise, aus unterschiedlichen Gründen und mit allen möglichen Mitteln im Nationalsozialismus Widerstand leisten. So werden etwa jüdische Mitbürger versteckt, militärische Geheimnisse an die Kriegsgegner weitergegeben un
From playlist Widerstand im Nationalsozialismus - Kampf gegen Hitler
Math Dispute Breakdown: In Defense of Analysis
Summary of my discussion with Professor NJ Wildberger on whether we can admit the notions of infinity that appear in the theory of analysis. I try to make my arguments more clear, add some comments about what we discussed, and set up the important points for further debate. My discussion
From playlist Daniel Rubin Show, Full episodes
The Unbearable Beauty of the Night Sky
Take a DEEP BREATH before watching this ESOCast mashup with Dr. J. The Sun is setting behind Cerro Paranal in the Chilean Atacama desert. While astronomers get ready to observe with ESO's Very Large Telescope, Nature prepares for her own grand display. As night falls over the desert, the s
From playlist Earth And Its Moon
Portraits of Power - Hitler - The Road to Revenge Narrated by Henry Fonda Adolf Hitler (20 April 1889 -- 30 April 1945) was an Austrian-born German politician and the leader of the Nazi Party (German: Nationalsozialistische Deutsche Arbeiterpartei (NSDAP); National Socialist German Worker
From playlist Portraits of Power - Those who shaped the Twentieth Century
Rainbow structures, Latin squares & graph decompositions - Benny Sudakov
Computer Science/Discrete Mathematics Seminar I Topic: Rainbow structures, Latin squares & graph decompositions Speaker: Benny Sudakov Affiliation: ETH Zürich Date: March 01, 2021 For more video please visit http://video.ias.edu
From playlist Mathematics