In the mathematical field of extremal graph theory, homomorphism density with respect to a graph is a parameter that is associated to each graph in the following manner: . Above, is the set of graph homomorphisms, or adjacency preserving maps, from to . Density can also be interpreted as the probability that a map from the vertices of to the vertices of chosen uniformly at random is a graph homomorphism. There is a connection between homomorphism densities and subgraph densities, which is elaborated on below. (Wikipedia).
Homomorphisms in abstract algebra
In this video we add some more definition to our toolbox before we go any further in our study into group theory and abstract algebra. The definition at hand is the homomorphism. A homomorphism is a function that maps the elements for one group to another whilst maintaining their structu
From playlist Abstract algebra
What is a Group Homomorphism? Definition and Example (Abstract Algebra)
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys What is a Group Homomorphism? Definition and Example (Abstract Algebra)
From playlist Abstract Algebra
Homomorphisms in abstract algebra examples
Yesterday we took a look at the definition of a homomorphism. In today's lecture I want to show you a couple of example of homomorphisms. One example gives us a group, but I take the time to prove that it is a group just to remind ourselves of the properties of a group. In this video th
From playlist Abstract algebra
This is lecture 3 of an online mathematics course on group theory. It gives a review of homomorphisms and isomorphisms and gives some examples of these.
From playlist Group theory
Group Homomorphisms - Abstract Algebra
A group homomorphism is a function between two groups that identifies similarities between them. This essential tool in abstract algebra lets you find two groups which are identical (but may not appear to be), only similar, or completely different from one another. Homomorphisms will be
From playlist Abstract Algebra
Chapter 6: Homomorphism and (first) isomorphism theorem | Essence of Group Theory
The isomorphism theorem is a very useful theorem when it comes to proving novel relationships in group theory, as well as proving something is a normal subgroup. But not many people can understand it intuitively and remember it just as a kind of algebraic coincidence. This video is about t
From playlist Essence of Group Theory
Visual Group Theory, Lecture 4.1: Homomorphisms and isomorphisms
Visual Group Theory, Lecture 4.1: Homomorphisms and isomorphisms A homomoprhism is function f between groups with the key property that f(ab)=f(a)f(b) holds for all elements, and an isomorphism is a bijective homomorphism. In this lecture, we use examples, Cayley diagrams, and multiplicat
From playlist Visual Group Theory
The Composition of Group Homomorphisms is a Group Homomorphism
We are given two group homomorphisms and we prove that their composition is also a group homomorphism. I hope this helps someone who is learning abstract algebra. Useful Math Supplies https://amzn.to/3Y5TGcv My Recording Gear https://amzn.to/3BFvcxp (these are my affiliate links) *******
From playlist Group Theory Problems
Graph Density Inequalities, Sums of Squares and Tropicalization - Annie Raymond
Computer Science/Discrete Mathematics Seminar I Topic: Graph Density Inequalities, Sums of Squares and Tropicalization Speaker: Annie Raymond Affiliation: University of Massachusetts Amherst Date: February 01, 2021 For more video please visit http://video.ias.edu
From playlist Mathematics
14. Graph limits I: introduction
MIT 18.217 Graph Theory and Additive Combinatorics, Fall 2019 Instructor: Yufei Zhao View the complete course: https://ocw.mit.edu/18-217F19 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP62qauV_CpT1zKaGG_Vj5igX Graph limits provide a beautiful analytic framework for s
From playlist MIT 18.217 Graph Theory and Additive Combinatorics, Fall 2019
The expected difference between N(f) and MF(f)
A talk about Nielsen theory at the 2016 conference on Nielsen Theory and related topics at UNESP Rio Claro, SP Brazil. Given July 5, 2016. Conference website: http://igce.rc.unesp.br/#!/departamentos/matematica/nielsen-theory/ Link to Chris Staecker webarea: http://cstaecker.fairfield.ed
From playlist Research & conference talks
Sparse Graph Limits 1: Left and Right convergence - Jennifer Chayes
Conference on Graphs and Analysis Jennifer Chayes June 6, 2012 More videos on http://video.ias.edu
From playlist Mathematics
Quantization by Branes and Geometric Langlands (Lecture 4) by Edward Witten
Program Quantum Fields, Geometry and Representation Theory 2021 (ONLINE) ORGANIZERS: Aswin Balasubramanian (Rutgers University, USA), Indranil Biswas (TIFR, india), Jacques Distler (The University of Texas at Austin, USA), Chris Elliott (University of Massachusetts, USA) and Pranav Pandi
From playlist Quantum Fields, Geometry and Representation Theory 2021 (ONLINE)
Workshop 1 "Operator Algebras and Quantum Information Theory" - CEB T3 2017 - V.Paulsen
Vern Paulsen (Waterloo) / 12.09.17 Title: C*-algebras and Synchronous Games. Abstract: In recent years a deep connection has been found between Connnes’ embedding problem and Tsirelson’s questions about various sets of probabilistic quantum correlations, called local, quantum, quantum a
From playlist 2017 - T3 - Analysis in Quantum Information Theory - CEB Trimester
Workshop 1 "Operator Algebras and Quantum Information Theory" - CEB T3 2017 - D.Farenick
Douglas Farenick (University of Toronto) / 13.09.17 Title: Isometric and Contractive of Channels Relative to the Bures Metric Abstract:In a unital C*-algebra A possessing a faithful trace, the density operators in A are those positive elements of unit trace, and the set of all density el
From playlist 2017 - T3 - Analysis in Quantum Information Theory - CEB Trimester
17. Graph limits IV: inequalities between subgraph densities
MIT 18.217 Graph Theory and Additive Combinatorics, Fall 2019 Instructor: Yufei Zhao View the complete course: https://ocw.mit.edu/18-217F19 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP62qauV_CpT1zKaGG_Vj5igX Among all graphs with a given edge density, which graph h
From playlist MIT 18.217 Graph Theory and Additive Combinatorics, Fall 2019
Homomorphisms (Abstract Algebra)
A homomorphism is a function between two groups. It's a way to compare two groups for structural similarities. Homomorphisms are a powerful tool for studying and cataloging groups. Be sure to subscribe so you don't miss new lessons from Socratica: http://bit.ly/1ixuu9W ♦♦♦♦♦♦♦♦♦♦ W
From playlist Abstract Algebra
Ben Green - University of Oxford Classical Fourier analysis has found many uses in additive number theory. However, while it is well-adapted to some pro - blems, it is unable to handle others. For example, if one has a set A, and one wishes to know how many 3-term arithmetic progressions
From playlist Ben Green - Nilsequences
The Image of a Group Homomorphism is a Subgroup (Proof)
We are given a group homomorphism from a group G into a group H. We prove that the image of f, the collection of all elements of the form f(x) where x is in G, is a subgroup of H. I hope this helps someone learning abstract algebra. Useful Math Supplies https://amzn.to/3Y5TGcv My Recordin
From playlist Group Theory Problems
Dependent random choice - Jacob Fox
Marston Morse Lectures Topic: Dependent random choice Speaker: Jacob Fox, Stanford University Date: October 26, 2016 For more videos, visit http://video.ias.edu
From playlist Mathematics