Representation theory of groups

Complex representation

In mathematics, a complex representation is a representation of a group (or that of Lie algebra) on a complex vector space. Sometimes (for example in physics), the term complex representation is reserved for a representation on a complex vector space that is neither real nor pseudoreal (quaternionic). In other words, the group elements are expressed as complex matrices, and the complex conjugate of a complex representation is a different, non-equivalent representation. For compact groups, the Frobenius-Schur indicator can be used to tell whether a representation is real, complex, or pseudo-real. For example, the N-dimensional fundamental representation of SU(N) for N greater than two is a complex representation whose complex conjugate is often called the antifundamental representation. (Wikipedia).

Video thumbnail

Complex Numbers as Matrices

In this video, we'll learn how to view a complex number as a 2x2 matrix with a special form. We'll also see that there is a matrix version for the number 1 and a matrix representation for the imaginary unit, i. Furthermore, the matrix representation for i has the defining feature of the im

From playlist Complex Numbers

Video thumbnail

Complex Matrices ( An intuitive visualization )

Complex Matrices are not given enough credit for what they do and even when they are used its often introduced as an foreign entity. This video was made to shed light on such a misinterpreted topic. Timestamps 00:00 - Introduction 00:11 - Matrix 00:45 - Complex Number 02:50 - Complex Ma

From playlist Summer of Math Exposition Youtube Videos

Video thumbnail

Complex Numbers as Points (1 of 4: Geometric Meaning of Addition)

More resources available at www.misterwootube.com

From playlist Complex Numbers

Video thumbnail

Introduction to Complex Numbers (Free Ebook)

http://bookboon.com/en/introduction-to-complex-numbers-ebook This free ebook makes learning "complex" numbers easy through an interactive, fun and personalized approach. Features include: live YouTube video streams and closed captions that translate to 90 languages! Complex numbers "break

From playlist Intro to Complex Numbers

Video thumbnail

Complex Numbers As Matrices

Today, we take a look at how we can represent complex numbers in matrix form.

From playlist Complex Analysis

Video thumbnail

What is the complex conjugate?

What is the complex conjugate of a complex number? Free ebook http://bookboon.com/en/introduction-to-complex-numbers-ebook

From playlist Intro to Complex Numbers

Video thumbnail

Representation theory: The Schur indicator

This is about the Schur indicator of a complex representation. It can be used to check whether an irreducible representation has in invariant bilinear form, and if so whether the form is symmetric or antisymmetric. As examples we check which representations of the dihedral group D8, the

From playlist Representation theory

Video thumbnail

Supercuspidal representations of GL(n) over a p-adic field distinguished... by Vincent Sécherre

PROGRAM : ALGEBRAIC AND ANALYTIC ASPECTS OF AUTOMORPHIC FORMS ORGANIZERS : Anilatmaja Aryasomayajula, Venketasubramanian C G, Jurg Kramer, Dipendra Prasad, Anandavardhanan U. K. and Anna von Pippich DATE & TIME : 25 February 2019 to 07 March 2019 VENUE : Madhava Lecture Hall, ICTS Banga

From playlist Algebraic and Analytic Aspects of Automorphic Forms 2019

Video thumbnail

Representations of Finite Groups | A few more common examples.

We present a few more common examples of representations of finite groups. These include cyclic groups, dihedral groups, the quaternions, and the symmetric group. Please Subscribe: https://www.youtube.com/michaelpennmath?sub_confirmation=1 Personal Website: http://www.michael-penn.net R

From playlist Representations of Finite Groups

Video thumbnail

Kevin Buzzard (lecture 16/20) Automorphic Forms And The Langlands Program [2017]

Full course playlist: https://www.youtube.com/playlist?list=PLhsb6tmzSpiysoRR0bZozub-MM0k3mdFR http://wwwf.imperial.ac.uk/~buzzard/MSRI/ Summer Graduate School Automorphic Forms and the Langlands Program July 24, 2017 - August 04, 2017 Kevin Buzzard (Imperial College, London) https://w

From playlist MSRI Summer School: Automorphic Forms And The Langlands Program, by Kevin Buzzard [2017]

Video thumbnail

Representation theory: Abelian groups

This lecture discusses the complex representations of finite abelian groups. We show that any group is iomorphic to its dual (the group of 1-dimensional representations, and isomorphic to its double dual in a canonical way (Pontryagin duality). We check the orthogonality relations for the

From playlist Representation theory

Video thumbnail

Vincent Sécherre - Congruence properties of endoclasses...

Congruence properties of endoclasses and the local Jacquet-Langlands correspondence Consider the local Jacquet-Langlands correspondence between the discrete series representations of a general linear group H over some non-Archimedean locally compact field F and those of an inner form G of

From playlist Reductive groups and automorphic forms. Dedicated to the French school of automorphic forms and in memory of Roger Godement.

Video thumbnail

[Lesson 28] QED Prerequisites Scattering 5

In this lesson we discover the integral representation of the Hankel function. We are doing this in preparation of executing the Method of Steepest Descents/Saddle Point Method to determine its asymptotic form. Please consider supporting this channel on Patreon: https://www.patreon.com/X

From playlist QED- Prerequisite Topics

Video thumbnail

Representations of Finite Groups | Definitions and simple examples.

We define the notion of a representation of a group on a finite dimensional complex vector space. We also explore one and two dimensional representations of the cyclic group Zn. Please Subscribe: https://www.youtube.com/michaelpennmath?sub_confirmation=1 Personal Website: http://www.mich

From playlist Representations of Finite Groups

Video thumbnail

Graphs in the Complex Plane (1 of 4: Introductory Examples)

More resources available at www.misterwootube.com

From playlist Complex Numbers

Video thumbnail

Higgs bundles and higher Teichmüller components (Lecture 1) by Oscar Garcia

DISCUSSION MEETING : MODULI OF BUNDLES AND RELATED STRUCTURES ORGANIZERS : Rukmini Dey and Pranav Pandit DATE : 10 February 2020 to 14 February 2020 VENUE : Ramanujan Lecture Hall, ICTS, Bangalore Background: At its core, much of mathematics is concerned with the problem of classif

From playlist Moduli Of Bundles And Related Structures 2020

Related pages

Group representation | Real representation | Antifundamental representation | Mathematics | Fundamental representation | Lie algebra representation | Group (mathematics)