Graph connectivity | Graph invariants | Algebraic graph theory
In graph theory, a branch of mathematics, the rank of an undirected graph has two unrelated definitions. Let n equal the number of vertices of the graph. * In the matrix theory of graphs the rank r of an undirected graph is defined as the rank of its adjacency matrix.Analogously, the nullity of the graph is the nullity of its adjacency matrix, which equals n − r. * In the matroid theory of graphs the rank of an undirected graph is defined as the number n − c, where c is the number of connected components of the graph. Equivalently, the rank of a graph is the rank of the oriented incidence matrix associated with the graph.Analogously, the nullity of the graph is the nullity of its oriented incidence matrix, given by the formula m − n + c, where n and c are as above and m is the number of edges in the graph. The nullity is equal to the first Betti number of the graph. The sum of the rank and the nullity is the number of edges. (Wikipedia).
Order and Size of a Graph | Graph Theory
What is the order and size of a graph? We'll go over them both in this math lesson! A graph is an ordered pair with a vertex set and an edge set. The order of a graph is the cardinality of its vertex set, which is the number of vertices in the graph. The size of a graph is the cardinality
From playlist Graph Theory
The Definition of a Graph (Graph Theory)
The Definition of a Graph (Graph Theory) mathispower4u.com
From playlist Graph Theory (Discrete Math)
From playlist M. Graph Theory
Graph theory full course for Beginners
In mathematics, graph #theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects. A #graph in this context is made up of vertices (also called nodes or points) which are connected by edges (also called links or lines). A distinction i
From playlist Graph Theory
Graph Theory: 02. Definition of a Graph
In this video we formally define what a graph is in Graph Theory and explain the concept with an example. In this introductory video, no previous knowledge of Graph Theory will be assumed. --An introduction to Graph Theory by Dr. Sarada Herke. This video is a remake of the "02. Definitio
From playlist Graph Theory part-1
Graph Theory: Basic Definitions
This video describes some basic definitions associated with graph theory.
From playlist Basics: Graph Theory
A walkthrough of the degree and valence value of vertices in graph theory
From playlist Graph Theory
What is a Graph? | Graph Theory
What is a graph? A graph theory graph, in particular, is the subject of discussion today. In graph theory, a graph is an ordered pair consisting of a vertex set, then an edge set. Graphs are often represented as diagrams, with dots representing vertices, and lines representing edges. Each
From playlist Graph Theory
What are Cubic Graphs? | Graph Theory
What are cubic graphs? We go over this bit of graph theory in today's math lesson! Recall that a regular graph is a graph in which all vertices have the same degree. The degree of a vertex v is the number of edges incident to v, or equivalently the number of vertices adjacent to v. If ever
From playlist Graph Theory
Introduction to Natural Quasirandomness: Unique Colorability and Order-ability - Leonardo Coregliano
Computer Science/Discrete Mathematics Seminar II Topic: Introduction to Natural Quasirandomness: Unique Colorability and Orderability Speaker: Leonardo Coregliano Affiliation: Member, School of Mathematics Date: November 08, 2022 The theory of graph quasirandomness studies sequences of g
From playlist Mathematics
Asymptotic spectra and Applications I - Jeroen Zuiddam
Computer Science/Discrete Mathematics Seminar I Topic: Asymptotic spectra and Applications I Speaker: Jeroen Zuiddam Affiliation: Member, School of Mathematics Date: October 8, 2019 For more video please visit http://video.ias.edu
From playlist Mathematics
On finite dimensional omega-categorical structures (...) - P. Simon - Workshop 1 - CEB T1 2018
Pierre Simon (Berkeley) / 31.01.2018 On finite dimensional omega-categorical structures and NIP theories The study of omega-categorical structures lies at the intersection of model theory, combinatorics and group theory. Some classes of omega-categorical structures have been classified,
From playlist 2018 - T1 - Model Theory, Combinatorics and Valued fields
Adventures in Perturbation Theory by Jake Bourjaily
PROGRAM RECENT DEVELOPMENTS IN S-MATRIX THEORY (ONLINE) ORGANIZERS: Alok Laddha, Song He and Yu-tin Huang DATE: 20 July 2020 to 31 July 2020 VENUE:Online Due to the ongoing COVID-19 pandemic, the original program has been canceled. However, the meeting will be conducted through online
From playlist Recent Developments in S-matrix Theory (Online)
Lorenzo Ruffoni - Graphical splittings of Artin kernels
38th Annual Geometric Topology Workshop (Online), June 15-17, 2021 Lorenzo Ruffoni, Florida State University Title: Graphical splittings of Artin kernels Abstract: A main feature of the theory of right-angled Artin groups (RAAGs) consists in the fact that the algebraic properties of the g
From playlist 38th Annual Geometric Topology Workshop (Online), June 15-17, 2021
Singular Learning Theory - Seminar 14 - Matt Farrugia-Roberts on complexity of rank estimation
This seminar series is an introduction to Watanabe's Singular Learning Theory, a theory about algebraic geometry and statistical learning theory. In this seminar Matt Farrugia-Roberts explains some of the results from his upcoming MSc thesis on the relation between computational complexity
From playlist Singular Learning Theory
Four Color Theorem via Gauge Theory and Three Manifold Topology - Tom Mrowka [2016]
slides for this talk: https://drive.google.com/file/d/1o-WQOW5Dwec5AmMNelfaJAu4KxOS4vdm/view?usp=sharing Name: Tom Mrowka Event: Workshop: Recent Developments in the Mathematical study of Gauge Theory Event URL: view webpage Title: An approach to the Four Color Theorem via Gauge Theory an
From playlist Mathematics
Vertex gluings and Demazure products by Nathan Pflueger
PROGRAM COMBINATORIAL ALGEBRAIC GEOMETRY: TROPICAL AND REAL (HYBRID) ORGANIZERS Arvind Ayyer (IISc, India), Madhusudan Manjunath (IITB, India) and Pranav Pandit (ICTS-TIFR, India) DATE & TIME: 27 June 2022 to 08 July 2022 VENUE: Madhava Lecture Hall and Online Algebraic geometry is t
From playlist Combinatorial Algebraic Geometry: Tropical and Real (HYBRID)
Algebraic curves, tropical geometry, and moduli - Sam Payne
Sam Payne Yale University February 11, 2015 Tropical geometry gives a new approach to understanding old questions about algebraic curves and their moduli spaces, synthesizing techniques that range from Berkovich spaces to elementary combinatorics. I will discuss an outline of this method,
From playlist Mathematics
A formal definition of a Graph and its properties
From playlist Graph Theory
Gianluca Paolini: Torsion-free Abelian groups are Borel complete
HYBRID EVENT Recorded during the meeting "XVI International Luminy Workshop in Set Theory" the September 14, 2021 by the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Guillaume Hennenfent Find this video and other talks given by worldwide mathematicia
From playlist Logic and Foundations