Lie Algebras and Groups

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Mathematics".

Deadline for manuscript submissions: closed (15 October 2019) | Viewed by 1808

Special Issue Editor


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Guest Editor
Distinguished Professor Emeritus, Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, USA
Interests: markov type lie algebras and monoids; entropy and information theory; generalized lie algebras; riemannian geometry reformulated as a generalized lie algebra; mathematical network theory; lie algebras as representing observable operators for measurements; representation theory; nonlinear differential equations

Special Issue Information

Dear Colleagues,

Sophus Lie’s formulation of continuous transformations utilized the concept of “infinitesimal generators” that formed a new mathematical structure, a “Lie algebra”, whose exponential map generated continuous transformations, or “Lie groups”. A Lie algebra is a linear vector space with an antisymmetric product obeying the Jacobi identity and denoting another member of the algebra as a linear combination (structure constant), a basic element of algebra. They formed the foundational symmetries of translations and Lorentz transformations in the Poincare symmetry algebra. The Heisenberg Lie algebra provided the basis of quantum theory with differential operators rather than matrices, producing the Fourier transform method. Lie algebras were soon used to represent approximate symmetries, then “spectrum generating” algebras, algebras of observables, and the “standard model”. We are learning to reframe earlier mathematics as representations of extended Lie algebras in new fields: diffusion, entropy, information theory, and the equations of general relativity are now revealing new patterns.  

Dr. Joseph Johnson
Guest Editor

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Keywords

  • Lie algebras
  • Lie groups
  • Fourier and harmonic analysis
  • Information theory
  • Entropy
  • Differential equations
  • Non-linear systems
  • Markov transformations
  • Approximate symmetry
  • Topological spaces

Published Papers (1 paper)

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Research

7 pages, 259 KiB  
Article
On Finite Quasi-Core-p p-Groups
by Jiao Wang and Xiuyun Guo
Symmetry 2019, 11(9), 1147; https://doi.org/10.3390/sym11091147 - 10 Sep 2019
Cited by 1 | Viewed by 1421
Abstract
Given a positive integer n, a finite group G is called quasi-core-n if x / x G has order at most n for any element x in G, where x G is the normal [...] Read more.
Given a positive integer n, a finite group G is called quasi-core-n if x / x G has order at most n for any element x in G, where x G is the normal core of x in G. In this paper, we investigate the structure of finite quasi-core-p p-groups. We prove that if the nilpotency class of a quasi-core-p p-group is p + m , then the exponent of its commutator subgroup cannot exceed p m + 1 , where p is an odd prime and m is non-negative. If p = 3 , we prove that every quasi-core-3 3-group has nilpotency class at most 5 and its commutator subgroup is of exponent at most 9. We also show that the Frattini subgroup of a quasi-core-2 2-group is abelian. Full article
(This article belongs to the Special Issue Lie Algebras and Groups)
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