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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Symmetry in Numerical Analysis and Applied Mathematics submission deadline 31 Dec 2025 | 6 articles | Viewed by 5426 | 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)
Recent Developments and Applications in Nonlinear Optics
edited by
submission deadline 31 Dec 2025 | 3 articles | Viewed by 4821 | 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)
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 4452 | 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
Supersymmetry and Supersymmetric Field Theories
edited by
submission deadline 31 Dec 2025 | 2 articles | Viewed by 4226 | 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 3653 | 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)
Advances in Perovskites: Growth, Characterization and Optoelectronic Devices
edited by Longxing Su
submission deadline 31 Dec 2025 | 2 articles | Viewed by 3484 | 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 and Asymmetry Study in Object Detection
edited by Vladimir Brtka, Dragan Kukolj, Dragan M. Samardžija and
submission deadline 31 Dec 2025 | 5 articles | Viewed by 3442 | 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)
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 3420 | 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)
Symmetry and Asymmetry in Computer Vision and Graphics
edited by Yuanfeng Lian and Jian-wei Liu
submission deadline 31 Dec 2025 | 4 articles | Viewed by 3375 | 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 in Reliability Engineering
edited by , Cun Shi and Xiaoyu Cui
submission deadline 31 Dec 2025 | 2 articles | Viewed by 3168 | 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)
Symmetry in Mathematical Optimization Algorithm and Its Applications
edited by Zhe Sun
submission deadline 31 Dec 2025 | 4 articles | Viewed by 2983 | 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)
Symmetry/Asymmetry and Novel Nanomaterials: Preparation, Characterizations, and Applications submission deadline 31 Dec 2025 | 1 articles | Viewed by 2975 | Submission Open
(This special issue belongs to the Section Engineering and Materials)
Advances in Optical and Electrical Integrated Circuits with Symmetry/Asymmetry
edited by
submission deadline 31 Dec 2025 | 1 articles | Viewed by 2537 | Submission Open
(This special issue belongs to the Section Physics)
Lorentz Invariance Violation and Space–Time Symmetry Breaking
edited by and
submission deadline 31 Dec 2025 | 2 articles | Viewed by 2507 | 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 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 2319 | 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)
Mathematics: Feature Papers 2025
edited by
submission deadline 31 Dec 2025 | 6 articles | Viewed by 2294 | 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)
Quantum Optics and Symmetry
edited by and Aimin Yan
submission deadline 31 Dec 2025 | 1 articles | Viewed by 2204 | Submission Open
Keywords: quantum optics; quantum neural network; quantum optical information processing; quantum symmetry
(This special issue belongs to the Section Physics)
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 2131 | 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)
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 2126 | 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)
Advances in Mathematical Models and Partial Differential Equations: 2nd Edition
edited by Yunhu Wang and
submission deadline 31 Dec 2025 | 4 articles | Viewed by 2092 | Submission Open
Keywords: partial differential equation; mathematical method
(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 2008 | 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)
Advances in Mechanics of Rigid and Flexible Systems: Mathematical Models, Numerical Modelling, Experiments, Symmetry and Applications submission deadline 31 Dec 2025 | 3 articles | Viewed by 1904 | 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/Asymmetry of Applications in Automation and Control Systems
edited by , Ping Wang and Qiang Shen
submission deadline 31 Dec 2025 | 3 articles | Viewed by 1773 | 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)
Advances in Graph Theory Ⅱ
edited by Yuefang Sun
submission deadline 31 Dec 2025 | 4 articles | Viewed by 1763 | 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)
Symmetric Ordered Algebraic Structures and Lattice Theory
edited by
submission deadline 31 Dec 2025 | 2 articles | Viewed by 1724 | Submission Open
Keywords: algebraic structures; ordered algebra; commutative algebra; homological algebra; hypercompositional algebra; coding theory
(This special issue belongs to the Section Mathematics)
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 1705 | 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)
Selected Papers: Symmetry 2025—The Fifth Edition of the International Conference on Symmetry
edited by , Changzheng Qu and
submission deadline 31 Dec 2025 | 2 articles | Viewed by 1565 | Submission Open
Keywords: physics; mathematics; chemistry; engineering; computer science; symmetry applications
Symmetry in Nonlinear Dynamics
edited by Chaoran Liu, and Guobiao Hu
submission deadline 31 Dec 2025 | 2 articles | Viewed by 1377 | Submission Open
Keywords: Nonlinear Dynamics; Dynamical System; Symmetry
(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 1357 | 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)
Symmetry Study in Electromagnetism: Topics and Advances
edited by , Yinhong Liao and Wei Xiao
submission deadline 31 Dec 2025 | 1 articles | Viewed by 1327 | 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)
Advances in Topology and Algebraic Geometry submission deadline 31 Dec 2025 | 1 articles | Viewed by 1299 | 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)
Symmetry/Asymmetry in Artificial Intelligence for Healthcare Applications
edited by Yonggang Zhang, Hangyu Li and
submission deadline 31 Dec 2025 | 1 articles | Viewed by 1245 | Submission Open
Keywords: artificial intelligence; healthcare; symmetry; brain tumour diagnosis; autism spectrum disorders; multimodal models for disease diagnosis; personalized medicine
(This special issue belongs to the Section Computer)
Symmetry in Computational and Mathematical Methods in Fractional Calculus, Second Edition submission deadline 31 Dec 2025 | 1 articles | Viewed by 1089 | Submission Open
Keywords: fractional calculus; computational methods; mathematical methods; mathematical modeling
(This special issue belongs to the Section Mathematics)
The Fusion of Fuzzy Sets and Optimization Using Symmetry
edited by
submission deadline 31 Dec 2025 | 2 articles | Viewed by 1034 | Submission Open
Keywords: fuzzy games theory; fuzzy vector optimization; fuzzy goal programming; arithmetics of fuzzy intervals; fuzzification of crisp functions; extension principle
(This special issue belongs to the Section Mathematics)
Advances in Design and Analysis of Asymmetric Structures
edited by Xiaohua Li and Yongtao Bai
submission deadline 31 Dec 2025 | 2 articles | Viewed by 935 | Submission Open
Keywords: asymmetric structures; seismic design; torsional effects; nonlinear behavior; advanced materials; computational modeling; seismic resilience
(This special issue belongs to the Section Engineering and Materials)
Symmetry and Cosmology
edited by and Leila Lobato Graef
submission deadline 31 Dec 2025 | 1 articles | Viewed by 897 | Submission Open
Keywords: symmetry; cosmology; early universe; large-scale structure; quantum gravity; effective field theory; cosmological phase transitions; cosmic microwave background; cosmological perturbations
(This special issue belongs to the Section Physics)
Symmetry, Asymmetry and Other Patterns in Structural Engineering with Its Application
edited by
submission deadline 31 Dec 2025 | 1 articles | Viewed by 884 | 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)
Fault Diagnosis and Electronic Engineering in Symmetry
edited by Yan Li
submission deadline 31 Dec 2025 | 1 articles | Viewed by 808 | Submission Open
Keywords: electronic degradation; fault diagnostics; fault location; lifespan prediction; status evaluation; symmetrical fault; system reliability
(This special issue belongs to the Section Computer)
Asymmetry in Machine Learning
edited by Hui Zhang and
submission deadline 31 Dec 2025 | Viewed by 799 | Submission Open
Keywords: machine learning; prediction algorithms; accuracy; SVM; data set
(This special issue belongs to the Section Computer)
Advances in Intelligent Power Electronics with Symmetry/Asymmetry
edited by and Valeri Petrov Gochev
submission deadline 31 Dec 2025 | 1 articles | Viewed by 758 | Submission Open
Keywords: adaptive algorithms; asymmetry; energy efficiency; loss optimization; intelligent controllers; power circuit topology; power electronic devices and systems; predictive control; real-time diagnostics; symmetry
(This special issue belongs to the Section Engineering and Materials)
Quantum Mechanics: Concepts, Symmetries, and Recent Developments: 2nd Edition
edited by
submission deadline 31 Dec 2025 | 1 articles | Viewed by 622 | Submission Open
Keywords: supersymmetry; superintegrability; phase space formulation; entanglement; measurement theory; symmetry group invariance; representation theory; anyonsanions; deformation quantization
(This special issue belongs to the Section Physics)
Mechanism Research and Artificial Intelligence for the Monitoring and Evaluation of Electrical Equipment in Smart Grids and Electrified Transportation
edited by Kui Chen, Yujun Guo and Kai Liu
submission deadline 31 Dec 2025 | Viewed by 581 | Submission Open
Keywords: smart grids; new energy; energy storage; electrified transportation; electrical equipment; artificial intelligence; mechanism research; symmetry theory; insulation performance; state evaluation
(This special issue belongs to the Section Engineering and Materials)
Symmetry Principles and Gravity: Bridging the Fundamental Forces of Nature
edited by Shohreh Abdolrahimi
submission deadline 31 Dec 2025 | 1 articles | Viewed by 516 | Submission Open
Keywords: gravity; black holes; quantum gravity; symmetries; covariance; spacetime symmetries; equivalence principle; global symmetries; local symmetries; conformal theories; gauge symmetry; Yang– Mills gauge theory; supersymmetry; Killing symmetry; symmetry breaking
(This special issue belongs to the Section Physics)
Selected Papers from "2025 11th International Conference on Computing and Artificial Intelligence (ICCAI 2025)"
edited by
submission deadline 31 Dec 2025 | Viewed by 491 | Submission Open
Keywords: intelligent computing; genetic algorithm; simulated annealing algorithm; taboo search algorithm; evolutionary algorithm; heuristic algorithm; ant colony algorithm; artificial fish swarm algorithm; particle swarm algorithm; hybrid intelligent algorithm; immune algorithm; neural networks; machine learning; biocomputing; DNA computing; quantum computing; intelligent calculation and optimization; fuzzy logic; knowledge discovery; data mining; rough and fuzzy rough set; artificial intelligence and its applications; biometrics; pattern recognition; computer vision; machine vision; fingerprint recognition; face recognition; retina recognition; iris recognition; palmprint recognition; expert system; speech recognition; smart search; automatic programming; intelligent control; smart robot; language and image understanding; genetic programming; natural language processing; computer vision and robotics; adaptive systems; intelligent agent; intelligent control; neural net and support vector machine; fuzzy set theory; fuzzy control and system; knowledge management; intelligent and knowledge-based system; visual information processing; artificial intelligence tools and applications; AI applied to the IoT; health big data; intelligent manufacturing; smart clothing; computer and information technology; coding; cryptography; and information protection; compilers and operating systems; computer networks; mobile computing; and distributed systems; computer systems: architecture; parallel processing; and dependability; embedded systems; signal; image; and speech processing; software engineering; security and database systems; human– computer interaction; vision and graphics; programming languages; theory of computing; information systems; information technology; big data technologies and applications; mobile information systems; web intelligence applications and search; recent trends in information technology; computing in the internet of things; machine learning for the internet of everything; information retrieval
(This special issue belongs to the Section Computer)
Symmetry in Gravitational Waves and Astrophysics
edited by Shaoqi Hou and Pengming Zhang
submission deadline 31 Dec 2025 | Viewed by 449 | Submission Open
Keywords: symmetry; gravitational waves; memory effects; soft theorems; infrared triangle; black holes; celestial holography; detection
(This special issue belongs to the Section Physics)
Studies of Symmetry/Asymmetry in Cybersecurity submission deadline 31 Dec 2025 | Viewed by 421 | Submission Open
Keywords: symmetric cryptography; asymmetric cryptography; cloud security; IoT security; artificial intelligence in cybersecurity; machine learning for cyber defense; supply chain security; ransomware mitigation; zero trust architecture; critical infrastructure protection; data privacy and protection; 5G network security; insider threat detection; chaos-based encryption
(This special issue belongs to the Section Computer)
Internet of Things and Symmetry
edited by
submission deadline 31 Dec 2025 | Viewed by 420 | Submission Open
Keywords: Internet of Things (IoT); symmetry in IoT networks; fault diagnosis and reliability; symmetric encryption; Energy-efficient IoT systems; network topology optimization; IoT interoperability; digital twins; sensor fusion; federated learning; geometric symmetry; edge computing; IoT security; symmetrical system design; smart cities and IoT
(This special issue belongs to the Section Computer)
Symmetry in Computational Fluid Dynamics submission deadline 31 Dec 2025 | Viewed by 417 | Submission Open
Keywords: computational fluid dynamics; numerical analysis; fluids properties; application of computational models; droplets; bubbles; streamlines and fluid flows; fluid flow applications (chemistry; physics; mathematics; industrial; metallurgical; aeronautical; civil; medical; biology and engineering); numerical approaching analysis
(This special issue belongs to the Section Mathematics)
Novel Symmetric/Asymmetric Structures in High-Performance Photonic and Optoelectronic Devices
edited by Chuang Li, Jiaqi Liu and Sadeq Abbasi
submission deadline 31 Dec 2025 | Viewed by 416 | Submission Open
Keywords: carrier transport mechanism in the hetero/homojunction; semiconductor physics; charge carrier transport modulation; metasurface; photonic crystals; light field manipulation within nanoscale; photodetectors; solar cells; surface science; interface science; electronic structures; film fabrication technologies; passivation method; hydrophobic surfaces; organic and inorganic semiconductors
(This special issue belongs to the Section Engineering and Materials)
Advances in Plasma Physics with Symmetry/Asymmetry
edited by , and Jaroslav Krištof
submission deadline 31 Dec 2025 | Viewed by 406 | Submission Open
Keywords: plasma physics; plasma applications; nonthermal plasma; thermal plasma; fusion plasma; atmospheric plasma; low-pressure plasma; microplasma; plasma medicine; plasma actuators; plasma for surface treatment; dielectric barrier discharge
(This special issue belongs to the Section Physics)
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