Representation theory of Lie groups

Weyl character formula

In mathematics, the Weyl character formula in representation theory describes the characters of irreducible representations of compact Lie groups in terms of their highest weights. It was proved by Hermann Weyl . There is a closely related formula for the character of an irreducible representation of a semisimple Lie algebra. In Weyl's approach to the representation theory of connected compact Lie groups, the proof of the character formula is a key step in proving that every dominant integral element actually arises as the highest weight of some irreducible representation. Important consequences of the character formula are the Weyl dimension formula and the Kostant multiplicity formula. By definition, the character of a representation of G is the trace of , as a function of a group element . The irreducible representations in this case are all finite-dimensional (this is part of the Peter–Weyl theorem); so the notion of trace is the usual one from linear algebra. Knowledge of the character of gives a lot of information about itself. Weyl's formula is a closed formula for the character , in terms of other objects constructed from G and its Lie algebra. (Wikipedia).

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In this video, we will derive Euler's formula using a quaternion power, instead of a complex power, which will allow us to calculate quaternion exponentials such as e^(i+j+k). If you like quaternions, this is a pretty neat formula and a simple generalization of Euler's formula for complex

From playlist Math

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Euler's formulas, Rodrigues' formula

In this video I proof various generalizations of Euler's formula, including Rodrigues' formula and explain their 3 dimensional readings. Here's the text used in this video: https://gist.github.com/Nikolaj-K/eaaa80861d902a0bbdd7827036c48af5

From playlist Algebra

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From playlist Solve by Quadratic Formula | Learn About

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David Zywina, Computing Sato-Tate and monodromy groups.

VaNTAGe seminar on May 5, 2020. License: CC-BY-NC-SA Closed captions provided by Jun Bo Lau.

From playlist The Sato-Tate conjecture for abelian varieties

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In this video we give a simple teaser into the world of operator algebras. In particular, we talk about the Weyl algebra and compute some expressions that fulfill the property which defines the Heisenberg Lie algebra http://math.uchicago.edu/~may/REU2012/REUPapers/Lingle.pdf https://en.w

From playlist Algebra

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This video given Euler's identity, reviews how to derive Euler's formula using known power series, and then verifies Euler's identity with Euler's formula http://mathispower4u.com

From playlist Mathematics General Interest

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Arthur's trace formula and distribution of Hecke eigenvalues for GL(n) - Jasmin Matz

Jasmin Matz Member, School of Mathematics February 23, 2015 A classical problem in the theory of automorphic forms is to count the number of Laplace eigenfunctions on the quotient of the upper half plane by a lattice LL. For LL a congruence subgroup in SL(2,ℤ)SL(2,Z) the Weyl law was prov

From playlist Mathematics

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From playlist 4th Itzykson Colloquium - Moduli Spaces and Quantum Curves

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From playlist Fall 2017

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The Weyl law for algebraic tori - Ian Petrow

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From playlist Mathematics

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From playlist Nonperturbative and Numerical Approaches to Quantum Gravity, String Theory and Holography (Online)

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From playlist Mathematics

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The Magnetism of some Topological Semi-metals by Collin Broholm

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From playlist FRUSTRATED METALS AND INSULATORS (HYBRID, 2022)

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Using a Matrix Equation to Solve a System of Equations

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From playlist Matrix Equations

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From playlist Solve by Quadratic Formula | x^2+bx+c

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In this video I speak about the early history of group representation theory in quantum mechanics using the rather recent history book by Schneider on van der Waerden, called "Zwischen Zwei Disziplinen". Other names dropped are Frobenius, Burnside, Schur, Killing, Study, Cartan, Weyl, Brau

From playlist Physics

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From playlist Solve by Quadratic Formula | ax^2+bx+c

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From playlist Integrable Systems 9th Workshop

Related pages

Algebraic character | Admissible representation | Character theory | Macdonald identities | Weight (representation theory) | Weyl integration formula | Harish-Chandra character | Peter–Weyl theorem | Root system | Cartan subgroup | Hans Freudenthal | Infinitesimal character | Lie algebra representation | Jacobi triple product | Representation theory | Monster Lie algebra | Kac–Moody algebra | Kostant partition function | Mathematics | L'Hôpital's rule | Weyl group | Cartan subalgebra | Lie algebra | Compact group | Reductive group | Representation theory of SU(2) | Casimir element | Analytic function | Semisimple Lie algebra | Generalized Kac–Moody algebra