Special Issues

Symmetry publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Data Driven and Intelligent Aerospace and Robotics Systems submission deadline 31 Dec 2025 | 6 articles | Viewed by 15333 | Submission Open
(This special issue belongs to the Section Computer)
Symmetry in Computing Algorithms and Applications
edited by Lei Yue and
submission deadline 31 Dec 2025 | 9 articles | Viewed by 15325 | Submission Open
Keywords: symmetries of complex manufacturing systems; Artificial Intelligence (AI) in production scheduling; fuzzy computing; data analytics for manufacturing; cloud computing for manufacturing; predictive maintenance; real-time monitoring and control; supply chain optimization; computing applications; smart decision support for industry
(This special issue belongs to the Section Computer)
Symmetry in Classical and Quantum Gravity and Field Theory
edited by
submission deadline 31 Dec 2025 | 6 articles | Viewed by 13915 | Submission Open
Keywords: classical and quantum gravity; quantum field theory; symmetry and group theory; classical and quantum cosmology; classical and quantum black holes lie groups; diffeomorphisms; constrained and gauge systems; path integral and BRST quantization
(This special issue belongs to the Section Physics)
Skewed (Asymmetrical) Probability Distributions and Applications Across Disciplines, Fourth Edition submission deadline 31 Dec 2025 | 13 articles | Viewed by 12701 | Submission Open
Keywords: new applications and parameter interpretations of the main skewed distributions; parameter estimation and statistical developments; advances in modelling and simulations (i.e.; Monte Carlo sampling) of processes in mathematics; physics; chemistry; biology; and social sciences; efficient numerical methods to handle skewed distributions; skewed distributions and the modelling of infectious diseases; including COVID-19; the true meaning of skewed distributions in nature; skewed distributions in psychological and neurological sciences; non-normal distributions in biological and medical sciences; skewed distributions in describing social processes; the origin and fundamental interpretations of skewed distributions in mathematics; physics; chemistry; biology; and social sciences
(This special issue belongs to the Section Mathematics)
Symmetry in Finite Element Modeling and Mechanics submission deadline 31 Dec 2025 | 7 articles | Viewed by 12184 | Submission Open
Keywords: theoretical and computational mechanics; finite element modeling; damage and fracture mechanics; geometric modeling; numerical methods; continuum mechanics; boundary conditions
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Combinatorics and Discrete Mathematics
edited by
submission deadline 31 Dec 2025 | 9 articles | Viewed by 12172 | Submission Open
Keywords: infinite or finite groups; semigroups; designs and configurations; enumerative combinatorics; determinants and permanents; combinatorial sequences
(This special issue belongs to the Section Mathematics)
Asymmetric Centers in Optically Active Molecules Containing a Heteroatom submission deadline 31 Dec 2025 | 4 articles | Viewed by 11525 | Submission Open
Keywords: organometallic syntheses; heteroatomic asymmetry center; P-stereogenic center; asymmetric syntheses; enantioselective syntheses; resolution of racemates; optically active ligands; chiral P-ligands; homogeneous catalysis; transition metal complexes; chiral auxiliaries; chiral catalysts
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Three-Dimensional Dynamical Systems and Symmetry submission deadline 31 Dec 2025 | 8 articles | Viewed by 11074 | Submission Open
Keywords: mathematical models; continuous-time dynamical systems; discrete-time dynamical systems; time-delay dynamical systems; piecewise dynamical systems; fractional-order dynamical systems; symmetries; integrability; controllability; stability; special orbits (periodic orbits and limit cycles; homoclinic and heteroclinic orbits); bifurcations; chaotic behavior; numerical methods; numerical simulations
(This special issue belongs to the Section Mathematics)
Symmetry in Discrete and Combinatorial Geometry submission deadline 31 Dec 2025 | 3 articles | Viewed by 10922 | Submission Open
Keywords: polyhedra and polytopes; polyhedra and crystallography; crystal nets; polyhedral graphs; and skeletal polyhedral structures; polyhedra and maps on surfaces; tiling; packing; and covering; soft packings; nested clusters; and condensed matter; symmetry groups and reflection groups; discrete point sets; abstract polytopes; polyhedral design
(This special issue belongs to the Section Mathematics)
Symmetries and Ultra Dense Matter of Compact Stars II: Emergence of Symmetries in Strong Nuclear Correlations
edited by and Chihiro Sasaki
submission deadline 31 Dec 2025 | 6 articles | Viewed by 10397 | Submission Open
Keywords: superdense matter; topology changes; baryon parity-doublet symmetry; Cheshire cat mechanism; hadron-quark duality; emergent hidden symmetries; Weinberg’ s folk theorem; generalized Hohenberg-Kohn density functional; Landau– Migdal Fermi liquid; un-Fermi liquids; speed of sound; conformal symmetry; color superconductivity; neutron superfluidity
(This special issue belongs to the Section Physics)
Computational Mathematics and Its Applications in Numerical Analysis
edited by and
submission deadline 31 Dec 2025 | 8 articles | Viewed by 9764 | Submission Open
Keywords: computational mathematics for data science; applied mathematics in optimization problems; signal processing and mathematical images; scientific computing and algorithms; numerical analysis for problems arising in various fields 
(This special issue belongs to the Section Mathematics)
Symmetry in Thermal Fluid Sciences and Energy Applications submission deadline 31 Dec 2025 | 5 articles | Viewed by 8716 | Submission Open
Keywords: thermal and fluid science; energy production and use; fuels and combustion; diagnostic techniques of measurement; analysis for decision making in industry
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Nonlinear Partial Differential Equations and Rogue Waves
edited by
submission deadline 31 Dec 2025 | 4 articles | Viewed by 7852 | Submission Open
Keywords: nonlinear waves; coherent structures; the nonlinear Schrö dinger (NLS) equation; soliton on constant background; breathers; freak waves; rogue waves; extreme waves; wave packets; modulational instability; phase singularity; wavefront dislocation; variational formulation; maximum temporal amplitude; amplification factor; dissipation; surface gravity waves; nonlinear optics; superconductivity; plasma physics; Bose– Einstein condensates
(This special issue belongs to the Section Mathematics)
Symmetry in Mathematical Analysis and Functional Analysis: 3rd Edition submission deadline 31 Dec 2025 | 5 articles | Viewed by 7698 | Submission Open
Keywords: optimization; classical and generalized convexity; inequalities; extension of linear operators; sandwich conditions; moment problems; polynomial approximation; Banach lattices; self-adjoint operators; partial differential equations; dynamical systems; variational inequalities; evolutionary problems
(This special issue belongs to the Section Mathematics)
Mathematics: Feature Papers 2025
edited by
submission deadline 31 Dec 2025 | 14 articles | Viewed by 7586 | Submission Open
Keywords: dynamical systems; mathematical physics; geometrical and topological methods; applied mathematics; discrete mathematics and graph theory; mathematical analysis
(This special issue belongs to the Section Mathematics)
Computer-Aided Geometric Design and Matrices submission deadline 31 Dec 2025 | 3 articles | Viewed by 7264 | Submission Open
Keywords: matrices; total positivity; high relative accuracy; subdivision; splines and NURBS; shape analysis; isogeometric analysis; interpolation; approximation and smoothing; wavelets and multi-resolution methods; computer graphics; virtual design
(This special issue belongs to the Section Mathematics)
Discrete and Continuous Memristive Nonlinear Systems and Symmetry II
edited by , and
submission deadline 31 Dec 2025 | 3 articles | Viewed by 7054 | Submission Open
Keywords: chaos; nonlinear system; memristive system; fraction-order memristor; fractional-order memristive system; image encryption; neural network; brain-like computing; memristor based artificial intelligence; symmetry
(This special issue belongs to the Section Physics)
Symmetry in Numerical Analysis and Applied Mathematics submission deadline 31 Dec 2025 | 6 articles | Viewed by 6565 | Submission Open
Keywords: artificial intelligence methods; heuristic algorithms; computer mathematics; numerical analysis; mathematical modeling; numerical methods; differential; integral; and functional equations
(This special issue belongs to the Section Mathematics)
Symmetry and Asymmetry in Computer Vision and Graphics
edited by Yuanfeng Lian and Jian-wei Liu
submission deadline 31 Dec 2025 | 5 articles | Viewed by 6117 | Submission Open
Keywords: neural networks and deep learning; generative models; pre-training models; multimodal large models; cross-modal learning; object detection; tracking; and recognition; action recognition; three-dimensional reconstruction and rendering; computational geometry; shape analysis and retrieval; visualization and visual analysis; VR/AR/MR; digital twins; human– computer interaction; interactive machine learning; interactive embodied intelligence
(This special issue belongs to the Section Computer)
Symmetry/Asymmetry in Motor Control, Drives and Power Electronics
edited by and Qiang Tan
submission deadline 31 Dec 2025 | 3 articles | Viewed by 6083 | Submission Open
Keywords: motor; control; drive; power electronics; magnetic levitation; position detection; parameter identification
(This special issue belongs to the Section Computer)
Recent Developments and Applications in Nonlinear Optics
edited by
submission deadline 31 Dec 2025 | 3 articles | Viewed by 5225 | Submission Open
Keywords: Lie symmetry analysis; optical soliton solutions; non-Kerr laws; integration methods; nonlinear Schrö dinger's equation
(This special issue belongs to the Section Physics)
Symmetry and Asymmetry Study in Object Detection
edited by Vladimir Brtka, Dragan Kukolj, Dragan M. Samardžija and
submission deadline 31 Dec 2025 | 6 articles | Viewed by 5198 | Submission Open
Keywords: object detection; symmetry; asymmetry; computer vision; machine learning; pattern recognition; geometric properties; autonomous systems; robotics; medical imaging 
(This special issue belongs to the Section Computer)
Unraveling the Black Box: Unleashing the Power of Explainable Deep Learning in Advanced Engineering Sciences
edited by
submission deadline 31 Dec 2025 | 3 articles | Viewed by 4853 | Submission Open
Keywords: Explainable Deep Learning (XDL); medical image analysis; non-destructive testing; multi-modal data integration; interpretable deep learning models; genomic data analysis; big data analytics; autonomous vehicles; smart infrastructure systems; engineering sciences; AI transparency; digital twin; human action recognition
Advances in Mechanics of Rigid and Flexible Systems: Mathematical Models, Numerical Modelling, Experiments, Symmetry and Applications submission deadline 31 Dec 2025 | 5 articles | Viewed by 4787 | Submission Open
Keywords: mechanics; mechanisms; flexible structures; finite element modelling; multibody dynamics; experimental mechanics
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Mathematical Optimization Algorithm and Its Applications
edited by Zhe Sun
submission deadline 31 Dec 2025 | 6 articles | Viewed by 4670 | Submission Open
Keywords: combinatorial optimization; machine learning algorithm; heuristic algorithm; algorithm design; systems optimization and control; NP hard Problem optimization; parameter identification
(This special issue belongs to the Section Mathematics)
Supersymmetry and Supersymmetric Field Theories
edited by
submission deadline 31 Dec 2025 | 2 articles | Viewed by 4448 | Submission Open
Keywords: supergravity; superconformal field theories; supersymmetric objects; super integrable systems; AdS/CFT; relativistic and nonrelativistic holography; gauge super field theories; noncommutative quantum theories; supersymmetry in dynamical systems; supersymmetry in condensed matter and statistical physics
(This special issue belongs to the Section Physics)
Symmetry Fluid Dynamics in Materials and Metallurgical Processes
edited by and
submission deadline 31 Dec 2025 | 2 articles | Viewed by 4235 | Submission Open
Keywords: fluid dynamics; metallurgy; material processes; steelmaking; ladle refining; continuous casting; coppermaking; physical modeling; CFD
(This special issue belongs to the Section Engineering and Materials)
Trends and Prospects of Asymmetric and Symmetric Studies on Algorithms Optimizations
edited by and Jelena Misic
submission deadline 31 Dec 2025 | 2 articles | Viewed by 3989 | Submission Open
Keywords: symmetry; process optimization; optimization methods; machine learning; algorithm efficiency; model robustness; solution quality; interdisciplinary; economy; social activity; medicine; engineering
(This special issue belongs to the Section Computer)
Applications Based on Symmetry and Asymmetry in Deep Learning and Artificial Intelligence Methods
edited by Changshuo Wang, and Meiqing Wu
submission deadline 31 Dec 2025 | 4 articles | Viewed by 3988 | Submission Open
Keywords: point cloud symmetry; neural network architecture; symmetry-aware feature learning; 3D shape analysis; computer vision symmetry; deep learning invariance; geometric deep learning; symmetry detection; vision transformers; symmetrical pattern recognition
(This special issue belongs to the Section Computer)
Advances in Perovskites: Growth, Characterization and Optoelectronic Devices
edited by Longxing Su
submission deadline 31 Dec 2025 | 2 articles | Viewed by 3961 | Submission Open
Keywords: inorganic perovskites; inorganic-organic hybrid perovskites; characterizations; lattice symmetric/asymmetric; stability; simulations/DFT calculations; photodetectors; solar cells; laser diodes; light-emitting diodes
(This special issue belongs to the Section Physics)
Symmetry in Reliability Engineering
edited by , Cun Shi and Xiaoyu Cui
submission deadline 31 Dec 2025 | 3 articles | Viewed by 3956 | Submission Open
Keywords: prognostics and health management; failure mechanism analysis; degradation modeling; reliability estimation; fault-tolerant control; fault diagnosis; health management; network reliability analysis; maintenance strategy; digital twins
(This special issue belongs to the Section Engineering and Materials)
Advances in Graph Theory Ⅱ
edited by Yuefang Sun
submission deadline 31 Dec 2025 | 6 articles | Viewed by 3776 | Submission Open
Keywords: symmetry; graph; digraph; hypergraph; structural graph theory; extremal graph theory; random graph theory; spectral and algebraic graph theory; chemical graph theory; topological graph theory; graph algorithms; complexity analysis
(This special issue belongs to the Section Mathematics)
Symmetry/Asymmetry and Novel Nanomaterials: Preparation, Characterizations, and Applications submission deadline 31 Dec 2025 | 2 articles | Viewed by 3736 | Submission Open
(This special issue belongs to the Section Engineering and Materials)
Advances in Nonlinear Systems and Symmetry/Asymmetry
edited by and Zhongkui Sun
submission deadline 31 Dec 2025 | 4 articles | Viewed by 3638 | Submission Open
Keywords: nonlinear systems; coupled oscillators; complex networks; complex systems; synchronization; pattern formation; phase transitions
(This special issue belongs to the Section Mathematics)
Advances in Mathematical Models and Partial Differential Equations: 2nd Edition
edited by Yunhu Wang and
submission deadline 31 Dec 2025 | 7 articles | Viewed by 3636 | Submission Open
Keywords: partial differential equation; mathematical method
(This special issue belongs to the Section Mathematics)
Lorentz Invariance Violation and Space–Time Symmetry Breaking
edited by and
submission deadline 31 Dec 2025 | 2 articles | Viewed by 3229 | Submission Open
Keywords: Lorentz invariance violation; CPT symmetry violation; spontaneous symmetry breaking; space– time symmetries; quantum gravity; phenomenology of physics beyond the standard model; astroparticle physics and cosmology; test of Einstein's relativity
(This special issue belongs to the Section Physics)
Advances in Optical and Electrical Integrated Circuits with Symmetry/Asymmetry
edited by
submission deadline 31 Dec 2025 | 1 articles | Viewed by 2735 | Submission Open
(This special issue belongs to the Section Physics)
Selected Papers: Symmetry 2025—The Fifth Edition of the International Conference on Symmetry
edited by , Changzheng Qu and
submission deadline 31 Dec 2025 | 3 articles | Viewed by 2723 | Submission Open
Keywords: physics; mathematics; chemistry; engineering; computer science; symmetry applications
Advances in Multi-phase Flow: Symmetry, Asymmetry, and Applications
edited by Zhengwei Wang, , , Xijie Song and Wei Wang
submission deadline 31 Dec 2025 | 2 articles | Viewed by 2581 | Submission Open
Keywords: multi-phase flow; theoretical innovation; simulation techniques; experimental measurements; symmetric and asymmetric behaviour; industrial applications; micro- and nano-flow; cavitation; erosion; design optimization; risk reduction; performance and efficiency improvement; flow visualization; heat transfer; artificial intelligence; industrial digitization; digital twin; data-driven applications; physics-informed neural networks; HPC acceleration; GPU acceleration; laser doppler anemometry (LDA); particle image velocimetry (PIV); X-ray imaging; chemical processing; energy production; environmental sustainability; food engineering; biomedical sciences; pharmaceutical industry
(This special issue belongs to the Section Physics)
Symmetry in Fractional Derivatives, Fractional Equations and Fractional Order Systems
edited by Xiaoling Han and Chenghua Gao
submission deadline 31 Dec 2025 | 3 articles | Viewed by 2535 | Submission Open
Keywords: fractional differential equations; delay differential equations; functional equations; partial differential equations; stochastic differential equations; integral equations; dynamical systems; applications of fixed-point theorems to nonlinear equations
(This special issue belongs to the Section Mathematics)
Symmetry Study in Electromagnetism: Topics and Advances
edited by , Yinhong Liao and Wei Xiao
submission deadline 31 Dec 2025 | 3 articles | Viewed by 2488 | Submission Open
Keywords: electromagnetic symmetry; metamaterials; transformation optics; electromagnetic field manipulation; computational electromagnetics; electromagnetic device design; waveguides; antennas; symmetry in photonics; symmetry in materials science
(This special issue belongs to the Section Engineering and Materials)
Nuclear Symmetry Energy: From Finite Nuclei to Neutron Stars
edited by Martin Veselsky, George A. Souliotis, and
submission deadline 31 Dec 2025 | 2 articles | Viewed by 2454 | Submission Open
Keywords: nuclear matter; nuclear symmetry energy; finite nuclei; exotic nuclei; nuclear fission; nuclear reactions; neutron stars; phase transition; hybrid stars
(This special issue belongs to the Section Physics)
Quantum Optics and Symmetry
edited by and Aimin Yan
submission deadline 31 Dec 2025 | 1 articles | Viewed by 2391 | Submission Open
Keywords: quantum optics; quantum neural network; quantum optical information processing; quantum symmetry
(This special issue belongs to the Section Physics)
Advances in Topology and Algebraic Geometry submission deadline 31 Dec 2025 | 2 articles | Viewed by 2383 | Submission Open
Keywords: general and algebraic topology; topological aspects of algebraic geometry; projective spaces; manifold topology; topological groups
(This special issue belongs to the Section Mathematics)
Symmetric Ordered Algebraic Structures and Lattice Theory
edited by
submission deadline 31 Dec 2025 | 2 articles | Viewed by 2153 | Submission Open
Keywords: algebraic structures; ordered algebra; commutative algebra; homological algebra; hypercompositional algebra; coding theory
(This special issue belongs to the Section Mathematics)
Advances of Network Structures for Cooperative Working
edited by Yuhua Luo and
submission deadline 31 Dec 2025 | 1 articles | Viewed by 2151 | Submission Open
Keywords: network structures; impact of symmetry in networks; cooperative work; internet; social network; sensor network; neural network; Internet of Things; convolutional neural network; energy network; multi-cell; multi-unit structures
(This special issue belongs to the Section Computer)
Symmetry/Asymmetry of Applications in Automation and Control Systems
edited by , Ping Wang and Qiang Shen
submission deadline 31 Dec 2025 | 3 articles | Viewed by 2142 | Submission Open
Keywords: automatic control; adaptive control; model predictive control; guidance; navigation and control; intelligent control
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Computational and Mathematical Methods in Fractional Calculus, Second Edition submission deadline 31 Dec 2025 | 1 articles | Viewed by 1899 | Submission Open
Keywords: fractional calculus; computational methods; mathematical methods; mathematical modeling
(This special issue belongs to the Section Mathematics)
Symmetry, Asymmetry and Other Patterns in Structural Engineering with Its Application
edited by
submission deadline 31 Dec 2025 | 2 articles | Viewed by 1799 | Submission Open
Keywords: building structures; symmetry/asymmetry phenomena; computational methods; experimental methods; steel wood and concrete structures; structure geometry; symmetrical/asymmetrical load
(This special issue belongs to the Section Engineering and Materials)
Symmetry and Its Application in Differential Geometry and Topology, 4th Edition
edited by and Tiehong Zhao
submission deadline 31 Dec 2025 | 3 articles | Viewed by 1783 | Submission Open
Keywords: singularity theory; morse theory/discrete Morse theory; singularities; singular submanifolds; lightlike submanifolds; biharmonic submanifolds; warped product submanifolds; differentiable manifolds; Submanifold theory; Legendrian duality; front and frontal; physics; statistics; topological data analysis; computational topology; applied topology and geometry; topological and geometric methods in data analysis; spectral and geometric methods in machine learning and data analysis; persistent homology and cohomology; and applications; neuroscience; cancer biology; genomics; other sciences
(This special issue belongs to the Section Mathematics)
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