Geometry and Symmetry in Mathematical Physics

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "E4: Mathematical Physics".

Deadline for manuscript submissions: 31 October 2025 | Viewed by 1023

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Guest Editor
School of Computing and Engineering, University of West London, London W5 5RF, UK
Interests: differential geometry; algebra; group theory; topology; pure mathematics; combinatorics; matrix theory; construction set theory

Special Issue Information

Dear Colleagues,

Many phenomena in physics are described in terms of differential equations. Imposing symmetry to such problems often leads to drastic simplifications. For example, when considering problems where the underlying space is a Lie group, many questions turn into linear algebra problems. In other situations, symmetry assumptions reduce complicated partial differential equations to ordinary differential equations. As a main consequence, it is often possible to provide explicit solutions.

This Special Issue invites contributions that use symmetry techniques to address problems directly or indirectly related to problems arising in physics. Of particular interest are problems related to Riemannian and/or pseudo-Riemannian geometry as well as Lie theory.

We welcome contributions that add new theoretical knowledge, provide particular insights into computational techniques, or add a new perspective to otherwise known results in the field.

Dr. Thomas Bruun Madsen
Guest Editor

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Keywords

  • differential geometry
  • Riemannian and pseudo-Riemannian Metrics
  • Lie groups
  • holonomy

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Published Papers (2 papers)

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Research

32 pages, 920 KiB  
Article
Scalar Field Static Spherically Symmetric Solutions in Teleparallel F(T) Gravity
by Alexandre Landry
Mathematics 2025, 13(6), 1003; https://doi.org/10.3390/math13061003 - 19 Mar 2025
Viewed by 309
Abstract
We investigate in this paper the static radial coordinate-dependent spherically symmetric spacetime in teleparallel F(T) gravity for a scalar field source. We begin by setting the static field equations (FEs) to be solved and solve the conservation laws for scalar [...] Read more.
We investigate in this paper the static radial coordinate-dependent spherically symmetric spacetime in teleparallel F(T) gravity for a scalar field source. We begin by setting the static field equations (FEs) to be solved and solve the conservation laws for scalar field potential solutions. We simplify the FEs and then find a general formula for computing the new teleparallel F(T) solutions applicable for any scalar field potential V(T) and coframe ansatz. We compute new non-trivial teleparallel F(T) solutions by using a power-law coframe ansatz for each scalar potential case arising from the conservation laws. We apply this formula to find new exact teleparallel F(T) solutions for several cases of coframe ansatz parameter. The new F(T) solution classes will be relevant for studying the models close to Born–Infeld and/or scalarized Black Hole (BH) solutions inside the dark energy (DE) described by a fundamental scalar field such as quintessence, phantom energy or quintom system, to name only those types. Full article
(This article belongs to the Special Issue Geometry and Symmetry in Mathematical Physics)
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15 pages, 450 KiB  
Article
Weakly Ricci-Symmetric Space-Times and f (R,G) Gravity
by Yanlin Li, Uday Chand De and Krishnendu De
Mathematics 2025, 13(6), 943; https://doi.org/10.3390/math13060943 - 12 Mar 2025
Viewed by 288
Abstract
In the present article, we classify conformally flat weakly Ricci-symmetric space-times and obtain that they represent Robertson–Walker space-times. Furthermore, we provethat a Ricci-recurrent weakly Ricci-symmetric space-time is static and a Ricci-semi-symmetric weakly Ricci-symmetric space-time does not exist. Further, we acquire the conditions under [...] Read more.
In the present article, we classify conformally flat weakly Ricci-symmetric space-times and obtain that they represent Robertson–Walker space-times. Furthermore, we provethat a Ricci-recurrent weakly Ricci-symmetric space-time is static and a Ricci-semi-symmetric weakly Ricci-symmetric space-time does not exist. Further, we acquire the conditions under which a weakly Ricci-symmetric twisted space-time becomes a generalized Robertson–Walker space-time. Also, we examine the effect of conformally flat weakly Ricci-symmetric space-time solutions in f(R,G) gravity by considering two models, and we see that the null, weak and strong energy conditions are verified, but the dominant energy condition fails, which is also consistent with present observational studies that reveal the universe is expanding. Finally, we apply the flat Friedmann–Robertson–Walker metric to deduce a relation between deceleration, jerk and snap parameters. Full article
(This article belongs to the Special Issue Geometry and Symmetry in Mathematical Physics)
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