Symmetry in Integrable Systems: Topics and Advances

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

Deadline for manuscript submissions: 31 July 2025 | Viewed by 3931

Special Issue Editor


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Guest Editor
Department of Mathematics, Zhejiang University of Technology, Hangzhou 310014, China
Interests: nonlinear integrable systems; soliton theory
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Special Issue Information

Dear Colleagues,

Symmetries play a paramount important role in mathematics as well as in physics. Similarity solutions or invariant solutions of a physical problem can be constructed using the Lie group theory. The relationship between symmetries and conservation laws generates the Noether theorem. The related applications of symmetries are to determine higher-order and nonlocal symmetries, conservation laws, nonlocal conservation laws and specific solutions from reductions. The preceding volume would like to offer an overview of the comprehensive treatments of the Lie groups of transformations, the discovery and use of symmetries to construct solutions, the conservation laws and phenomenological applications thereof.

Potential topics include but are not limited to the following:

  • Symmetries;
  • Conservation laws;
  • Solitons;
  • Integrable systems;
  • Breathers;
  • Rogue waves;
  • Hirota bilinear method;
  • Darboux transformation;
  • Other miscellaneous applications of nonlinear integrable systems.

Prof. Dr. Bo Ren
Guest Editor

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Published Papers (3 papers)

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Research

12 pages, 1554 KiB  
Article
Exact and Data-Driven Lump Wave Solutions for the (3+1)-Dimensional Hirota–Satsuma–Ito-like Equation
by Fengxiang Li, Jieyi Wang and Yunqing Yang
Symmetry 2024, 16(11), 1469; https://doi.org/10.3390/sym16111469 - 5 Nov 2024
Cited by 2 | Viewed by 928
Abstract
In this paper, the lump wave solutions for (3+1)-dimensional Hirota–Satsuma–Ito-like (HSIl) equation are constructed by employing the Hirota bilinear method and quadratic function approach, and the corresponding propagation behaviors and nonlinear dynamical properties are also investigated. At the same time, the physics informed [...] Read more.
In this paper, the lump wave solutions for (3+1)-dimensional Hirota–Satsuma–Ito-like (HSIl) equation are constructed by employing the Hirota bilinear method and quadratic function approach, and the corresponding propagation behaviors and nonlinear dynamical properties are also investigated. At the same time, the physics informed neural network (PINN) deep learning technique is employed to study the data-driven solutions for the HSIl equation from the derived lump wave solutions. The machine learning results show high effectiveness and accuracy, providing new techniques for discussing more nonlinear dynamics of lump waves and discovering new lump wave solutions. Full article
(This article belongs to the Special Issue Symmetry in Integrable Systems: Topics and Advances)
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13 pages, 284 KiB  
Article
On Symmetries of Integrable Quadrilateral Equations
by Junwei Cheng, Jin Liu and Da-jun Zhang
Symmetry 2024, 16(6), 744; https://doi.org/10.3390/sym16060744 - 14 Jun 2024
Cited by 1 | Viewed by 782
Abstract
In the paper, we describe a method for deriving generalized symmetries for a generic discrete quadrilateral equation that allows a Lax pair. Its symmetry can be interpreted as a flow along the tangent direction of its solution evolving with a Lie group parameter [...] Read more.
In the paper, we describe a method for deriving generalized symmetries for a generic discrete quadrilateral equation that allows a Lax pair. Its symmetry can be interpreted as a flow along the tangent direction of its solution evolving with a Lie group parameter t. Starting from the spectral problem of the quadrilateral equation and assuming the eigenfunction evolves with the parameter t, one can obtain a differential-difference equation hierarchy, of which the flows are proved to be commuting symmetries of the quadrilateral equation. We prove this result by using the zero-curvature representations of these flows. As an example, we apply this method to derive symmetries for the lattice potential Korteweg–de Vries equation. Full article
(This article belongs to the Special Issue Symmetry in Integrable Systems: Topics and Advances)
10 pages, 1310 KiB  
Article
Some Novel Fusion and Fission Phenomena for an Extended (2+1)-Dimensional Shallow Water Wave Equation
by Kai Zhou, Jia-Rong Zhu and Bo Ren
Symmetry 2024, 16(1), 82; https://doi.org/10.3390/sym16010082 - 8 Jan 2024
Cited by 3 | Viewed by 1223
Abstract
An extended (2+1)-dimensional shallow water wave (SWW) model which can describe the evolution of nonlinear shallow water wave propagation in two spatial and temporal coordinates, is systematically studied. The multi-linear variable separation approach is addressed to the extended (2+1)-dimensional SWW equation. The variable [...] Read more.
An extended (2+1)-dimensional shallow water wave (SWW) model which can describe the evolution of nonlinear shallow water wave propagation in two spatial and temporal coordinates, is systematically studied. The multi-linear variable separation approach is addressed to the extended (2+1)-dimensional SWW equation. The variable separation solution consisting of two arbitrary functions is obtained, by assumption, from a specific ansatz. By selecting these two arbitrary functions as the exponential and trigonometric forms, resonant dromion, lump, and solitoff solutions are derived. Meanwhile, some novel fission and fusion phenomena including the semifoldons, peakons, lump, dromions, and periodic waves are studied with graphical and analytical methods. The results can be used to enhance the variety of the dynamics of the nonlinear wave fields related by engineering and mathematical physics. Full article
(This article belongs to the Special Issue Symmetry in Integrable Systems: Topics and Advances)
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