Geometric group theory | Coxeter groups | Algebraic combinatorics | Mathematical structures | Group theory
In mathematics, the Coxeter complex, named after H. S. M. Coxeter, is a geometrical structure (a simplicial complex) associated to a Coxeter group. Coxeter complexes are the basic objects that allow the construction of buildings; they form the apartments of a building. (Wikipedia).
Hankyung Ko: A singular Coxeter presentation
SMRI Algebra and Geometry Online Hankyung Ko (Uppsala University) Abstract: A Coxeter system is a presentation of a group by generators and a specific form of relations, namely the braid relations and the reflection relations. The Coxeter presentation leads to, among others, a similar pre
From playlist SMRI Algebra and Geometry Online
Group theory 23: Coxeter Todd algorithm
This lecture is part of an online mathematics course on group theory. It describes the Coxeter-Todd algorithm for coset enumeration, and gives some examples of it.
From playlist Group theory
What is General Relativity? Lesson 68: The Einstein Tensor
What is General Relativity? Lesson 68: The Einstein Tensor The Einstein tensor defined! Using the Ricci tensor and the curvature scalar we can calculate the curvature scalar of a slice of a manifold using the Einstein tensor. Please consider supporting this channel via Patreon: https:/
From playlist What is General Relativity?
Calculus 3: Tensors (10 of 45) Tensor of Rank 3: The Triad
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain a triad tensor “matrix”. A triad is a tensor of rank 3 has 27 components in a row, column, and page 3 dimensional “matrix”; and each component will have 3 subscripts. Next video in the series
From playlist CALCULUS 3 CH 10 TENSORS
Connections part 5: Riemannian Curvature Tensor and Faraday Tensor
This video was hacked together. Apologies.
From playlist Connections, Curvature and Covariant Derivatives
What is a Tensor? Lesson 20: Algebraic Structures II - Modules to Algebras
What is a Tensor? Lesson 20: Algebraic Structures II - Modules to Algebras We complete our survey of the basic algebraic structures that appear in the study of general relativity. Also, we develop the important example of the tensor algebra.
From playlist What is a Tensor?
Calculus 3: Tensors (11 of 45) Tensor of Rank 3: The Triad (A 2nd Look)
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain a triad tensor “matrix”. In this video I will concentrate on the subscript notations of the “rows”. (A triad is a tensor of rank 3 has 27 components in a “row”, “column”, and “page” 3 dimensio
From playlist CALCULUS 3 CH 10 TENSORS
What is a Tensor? Lesson 11: The metric tensor
What is a Tensor 11: The Metric Tensor
From playlist What is a Tensor?
Olga Varghese: Automorphism groups of Coxeter groups do not have Kazhdan's property (T)
CIRM VIRTUAL EVENT Recorded during the meeting "Virtual Geometric Group Theory conference " the May 27, 2020 by the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Guillaume Hennenfent Find this video and other talks given by worldwide mathematicians on CIR
From playlist Virtual Conference
Calculus 3: Tensors (1 of 28) What is a Tensor?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is a tensor. A tensor is a mathematical representation of a scalar (tensor of rank 0), a vector (tensor of rank 1), a dyad (tensor of rank 2), a triad (tensor or rank 3). Next video in t
From playlist CALCULUS 3 CH 10 TENSORS
Invariants of Graphs, Their Associated Clique Complexes and Right-Angled... - Michael Davis
Michael Davis The Ohio State University; Member, School of Mathematics October 19, 2010 Associated to any simplicial graph there is a right-angled Coxeter group. Invariants of the Coxeter group such as its growth series or its weighted L^2 Betti numbers can be computed from the graph's cli
From playlist Mathematics
Homological Algebra(Homo Alg) 5 by Graham Ellis
DATE & TIME 05 November 2016 to 14 November 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Computational techniques are of great help in dealing with substantial, otherwise intractable examples, possibly leading to further structural insights and the detection of patterns in many abstra
From playlist Group Theory and Computational Methods
Vic Reiner, Lecture III - 13 February 2015 (49)
Vic Reiner (University of Minnesota) - Lecture III http://www.crm.sns.it/course/4036/ Many results in the combinatorics and invariant theory of reflection groups have q-analogues for the finite general linear groups GLn(Fq). These lectures will discuss several examples, and open question
From playlist Vertex algebras, W-algebras, and applications - 2014-2015
Cong He: Right-angled Coxeter Groups with Menger Curve Boundary
Cong He, University of Wisconsin Milwaukee Title: Right-angled Coxeter Groups with Menger Curve Boundary Hyperbolic Coxeter groups with Sierpinski carpet boundary was investigated by {\'S}wi{\c{a}}tkowski. And hyperbolic right-angled Coxeter group with Gromov boundary as Menger curve was s
From playlist 39th Annual Geometric Topology Workshop (Online), June 6-8, 2022
Petra Schwer: Studying affine Deligne Lusztig varieties via folded galleries in buildings
Abstract: We present a new approach to affine Deligne Lusztig varieties which allows us to study the so called "non-basic" case in a type free manner. The central idea is to translate the question of non-emptiness and the computation of the dimensions of these varieties into geometric ques
From playlist Algebra
Vectors: Addition and Scalar Multiplication
This is the first video of a series from the Worldwide Center of Mathematics explaining the basics of vectors. This video deals with vector notation, vector addition, and scalar multiplication. For more math videos, visit our channel or go to www.centerofmath.org
From playlist Basics: Vectors
From Coxeter Higher-Spin Theories to Strings and Tensor Models by Mikhail Vasiliev
ORGANIZERS : Pallab Basu, Avinash Dhar, Rajesh Gopakumar, R. Loganayagam, Gautam Mandal, Shiraz Minwalla, Suvrat Raju, Sandip Trivedi and Spenta Wadia DATE : 21 May 2018 to 02 June 2018 VENUE : Ramanujan Lecture Hall, ICTS Bangalore In the past twenty years, the discovery of the AdS/C
From playlist AdS/CFT at 20 and Beyond
