In abstract algebra, in semigroup theory, a Schutzenberger group is a certain group associated with a Green H-class of a semigroup. The Schutzenberger groups associated with different H-classes are different. However, the groups associated with two different H-classes contained in the same D-class of a semigroup are isomorphic. Moreover, if the H-class itself were a group, the Schutzenberger group of the H-class would be isomorphic to the H-class. In fact, there are two Schutzenberger groups associated with a given H-class and each is antiisomorphic to the other. The Schutzenberger group was discovered by Marcel-Paul Schützenberger in 1957 and the terminology was coined by A. H. Clifford. (Wikipedia).
Thomas Colcombet : Algebra vs Logic over (generalised) words
CONFERENCE Recording during the thematic meeting : « Discrete mathematics and logic: between mathematics and the computer science » the January 17, 2023 at the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Jean Petit Find this video and other talks give
From playlist Logic and Foundations
Der Nürnberger Prozess - Die Verteidigung (4/8) / Hauptkriegsverbrecher-Prozess
Annektion von Österreich, Ernst Kaltenbrunnder, NSDAP, Chef des Reichssicherheitshauptamtes, Machtzentrale der SS, Mauthausen, Kommandant von Ausschwitz, Konzentrationslager, Berlin, Oranienburg, namenlose Häftlinge, Rüstungsindustrie, ungarische Juden, Ankläger, Alfred Rosenberg, Lehre de
From playlist Der Nürnberger Prozess - Die Verteidigung
From playlist Datenmanagement mit SQL bei Dr. Felix Naumann
Maxim Kontsevich - Jeux de Mots
Conférence grand public proposée par les Amis de l'IHES Jeudi 28 novembre 2013 Maxim KONTSEVICH « Jeux de Mots » Je vais parler de mots et de langages du point de vue d'un mathématicien. Qu'est-ce qu'un texte « universel » ? Comment peut-on mesurer la complexité d'un langage, naturel
From playlist Évenements grand public
Joseph Bengeloun - Quantum Mechanics of Bipartite Ribbon Graphs...
Quantum Mechanics of Bipartite Ribbon Graphs: A Combinatorial Interpretation of the Kronecker Coefficient. The action of subgroups on a product of symmetric groups allows one to enumerate different families of graphs. In particular, bipartite ribbon graphs (with at most edges) enumerate
From playlist Combinatorics and Arithmetic for Physics: 02-03 December 2020
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
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
Doron Zeilberger: Using symbolic dynamical programming in lattice paths combinatorics
CIRM HYBRID EVENT Recorded during the meeting "Lattice Paths, Combinatorics and Interactions" the June 25, 2021 by the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Guillaume Hennenfent Find this video and other talks given by worldwide mathematicians
From playlist Combinatorics
Manfred Madritsch: The sum-of-digits function in linearly recurrent number systems and almost primes
CIRM VIRTUAL CONFERENCE Recorded during the meeting " Diophantine Problems, Determinism and Randomness" the November 27, 2020 by the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Guillaume Hennenfent Find this video and other talks given by worldwide
From playlist Virtual Conference
Der Nürnberger Prozess - Die Verteidigung (1/8) / Hauptkriegsverbrecher-Prozess
25 Hauptverteidiger, 70 Hilfsverteidiger, 61 Zeugen, 2700 Dokumente, Fotos und eidesstattliche Erklärungen, Dr. Dix, Verteidiger, Schacht, Prof. Hermann Jahrreiß, Prof. Franz Exner, Prof. Kraus, Dr. Seidl, Rudolf Heß, Frank, Dr. Sauter, Walter Funk, Baldur von Schirach, Dr. Marx, Julius St
From playlist Der Nürnberger Prozess - Die Verteidigung
Der Nürnberger Prozess - Das Urteil (4/9) / Hauptkriegsverbrecher-Prozess
Wolfram Heinrich Friedrich Sievers, Geschäftsführer der nationalsozialistischen Forschungsgemeinschaft Deutsches Ahnenerbe, Anatomisches Institut, Reichsuniversität Straßburg, Skelettsammlung, Anklage für den Generalstab und der deutschen Wehrmacht, Telford Taylor, Kommissarbefehl, politis
From playlist Der Nürnberger Prozess - Das Urteil
70 Jahre Grundgesetz: Wissenschaftsfreiheit in Gefahr? – Podiumsdiskussion
70 Jahre nach Inkrafttreten des Deutschen Grundgesetzes und des darin enthaltenen Artikels 5 Abs. 3 diskutierten Ulrich Becker, Direktor am Max-Planck-Institut für Sozialrecht und Sozialpolitik, Lorraine Daston, Direktorin am Max-Planck-Institut für Wissenschaftsgeschichte, und Ulrich Scho
From playlist Videos auf Deutsch
Lie Groups and Lie Algebras: Lesson 39 - The Universal Covering Group
Lie Groups and Lie Algebras: Lesson 39 - The Universal Covering Group We are finally in position to understand the nature of the Universal Covering Group and its connection to all the Lie groups which share a single Lie algebra. This is a critical lecture! In this lecture we simply state
From playlist Lie Groups and Lie Algebras
This lecture is part of an online graduate course on Lie groups. We give an introductory survey of Lie groups theory by describing some examples of Lie groups in low dimensions. Some recommended books: Lie algebras and Lie groups by Serre (anything by Serre is well worth reading) Repre
From playlist Lie groups
Why Are Prejudice and Conflict So Common? | Understanding the Mysteries of Human Behavior
It's no wonder discrimination seems to be everywhere: splitting people into two groups, even at random, makes them subconsciously dislike each other. A sense of competition can exaggerate these feelings. Pick up your tools; we've got some bridge building to do. Presented by Mark Leary Lea
From playlist Latest Uploads
Lie Groups and Lie Algebras: Lesson 38 - Preparation for the concept of a Universal Covering Group
Lie Groups and Lie Algebras: Lesson 38 - Preparation for the Universal Covering Group concept In this lesson we examine another amazing connection between the algebraic properties of the Lie groups with topological properties. We will lay the foundation to understand how discrete invaria
From playlist Lie Groups and Lie Algebras
Grothendieck Pairs and Profinite Rigidity - Martin Bridson
Arithmetic Groups Topic: Grothendieck Pairs and Profinite Rigidity Speaker: Martin Bridson Affiliation: Oxford University Date: January 26, 2022 If a monomorphism of abstract groups H↪G induces an isomorphism of profinite completions, then (G,H) is called a Grothendieck pair, recalling t
From playlist Mathematics
"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