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 Quantum Key Distribution
edited by Hamid Tebyanian, Mujtaba Zahidy and Rong Xue
submission deadline 31 May 2025 | Viewed by 158 | Submission Open
Keywords: quantum key distribution; device-independent QKD; semi-device-independent QKD; continuous-variable QKD; discrete-variable QKD; quantum security; quantum cryptography; quantum communication; side-channel attack resistance
(This special issue belongs to the Section Physics)
Symmetry in Nuclear Physics and Nuclear Astrophysics
edited by Jelena Vesić
submission deadline 15 Jun 2025 | Viewed by 301 | Submission Open
Keywords: nuclear structure; nuclear astrophysics; nuclear models; symmetry violations; nuclear symmetry energy
(This special issue belongs to the Section Physics)
Symmetry and Asymmetry in Machine Learning
edited by Qinwei Fan, and
submission deadline 30 Jun 2025 | 7 articles | Viewed by 36208 | Submission Open
Keywords: machine learning; deep learning; convolutional neural networks; spiking neural network; recurrent neural networks; graph neural network; long short-term memory; extreme learning machine; generative adversarial networks; reinforcement learning; clustering analysis; computer vision; natural language processing; time series analysis; model-based clustering modeling high-dimensional
(This special issue belongs to the Section Computer)
Symmetry and Asymmetry in AI-Enabled Human-Centric Collaborative Computing submission deadline 30 Jun 2025 | 8 articles | Viewed by 26979 | Submission Open
Keywords: symmetric learning frameworks; deep learning for symmetry; human-centric data management and balance/imbalance analysis; information diffusion and modelling in HCCC; deep learning for intelligent human computer interaction; symmetry/asymmetry network structure and community evolution analysis; human– cyber– physical interactions with symmetry/asymmetry; knowledge-driven human– computer interaction in cloud/edge; smart service quality optimization in HCCC; AI-enabled multi-agent systems in HCCC; AI-powered smart applications in HCCC
(This special issue belongs to the Section Computer)
Symmetry in Nonlinear Equations: Mathematical Models, Methods and Applications Ⅱ
edited by
submission deadline 30 Jun 2025 | 9 articles | Viewed by 17339 | Submission Open
Keywords: symmetry operators; mathematical modeling techniques; qualitative properties of solutions; oscillation theory; delay differential equations; ordinary differential/ difference equations; partial/functional equations; fractional differential and integral calculus; applications  
(This special issue belongs to the Section Mathematics)
Asymmetric Membranes: Volume 2 submission deadline 30 Jun 2025 | 3 articles | Viewed by 13811 | Submission Open
Keywords: asymmetric membranes; inorganic membranes; polymeric membranes; porous membranes; membrane design
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry/Asymmetry Studies in Modern Power Systems
edited by , Zhong Chen, Lei Chen and
submission deadline 30 Jun 2025 | 9 articles | Viewed by 13349 | Submission Open
Keywords: power systems; power electronics; symmetrical faults; asymmetrical faults; power system stability; balanced conditions; grid-forming converters
(This special issue belongs to the Section Engineering and Materials)
Applications Based on Symmetry/Asymmetry in Fluid Mechanics
edited by Xi Chen
submission deadline 30 Jun 2025 | 10 articles | Viewed by 11756 | Submission Open
(This special issue belongs to the Section Engineering and Materials)
Evolutionary Computation, Metaheuristics, Nature-Inspired Algorithms, and Symmetry
edited by , and Yang Yu
submission deadline 30 Jun 2025 | 6 articles | Viewed by 11103 | Submission Open
Keywords: evolutionary computation; metaheuristics; nature-inspired algorithms; single-objective optimization; multi-objective optimization; real-world engineering application; intelligent systems; Artificial Intelligence
(This special issue belongs to the Section Computer)
Symmetry and Applications of Differential Geometry to the Differential Equations of Mathematical Physics
edited by
submission deadline 30 Jun 2025 | 6 articles | Viewed by 10389 | Submission Open
Keywords: Gelfand's formal geometry; diffeologies; symmetries; first integrals; Hamiltonian geometry; h-principle; homotopy methods; approximation methods; approximate symmetries; symmetries in SPDE; higher homotopy; gauge fields; non-geometric fluxes; quantum field theory
(This special issue belongs to the Section Mathematics)
Hidden Dark Sector in High Energy Physics
edited by Theodota Lagouri
submission deadline 30 Jun 2025 | 3 articles | Viewed by 10322 | Submission Open
Keywords: high energy collider physics; LHC; hidden dark sector; exotic Higgs decays; dark photon; dark matter (DM); beyond the Standard Model (BSM)
(This special issue belongs to the Section Physics)
Symmetric or Asymmetric Distributions and Its Applications
edited by Xuelong Hu
submission deadline 30 Jun 2025 | 8 articles | Viewed by 10254 | Submission Open
Keywords: symmetric or asymmetric distributions; univariate distributions; multivariate distributions
(This special issue belongs to the Section Mathematics)
Symmetry in Finite Element Modeling and Mechanics submission deadline 30 Jun 2025 | 6 articles | Viewed by 10035 | 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 Energy in Nuclear Physics and Astrophysics submission deadline 30 Jun 2025 | 4 articles | Viewed by 9865 | Submission Open
Keywords: Nuclear symmetry energy; Equation of state; Nuclear structure; Nuclear astrophysics; Heavy ion physics; Neutron-rich nuclei; Nuclear binding energy; Symmetric nuclear matter; Neutron stars
(This special issue belongs to the Section Physics)
Special Functions, Integral Transforms and Polynomial Sequences in Real World with Symmetry submission deadline 30 Jun 2025 | 7 articles | Viewed by 9190 | Submission Open
(This special issue belongs to the Section Mathematics)
Application of Symmetry in Biomechanics
edited by , Saša Đurić and Vedrana Sember
submission deadline 30 Jun 2025 | 5 articles | Viewed by 8125 | Submission Open
Keywords: biomechanical symmetry; sports science; injury prevention and rehabilitation; performance optimization; biomechanical analysis
(This special issue belongs to the Section Life Sciences)
Symmetry/Asymmetry of Differential Equations in Biomathematics
edited by Liang Zhang, Junli Liu and Tailei Zhang
submission deadline 30 Jun 2025 | 6 articles | Viewed by 6835 | Submission Open
Keywords: differential equations; dynamical systems; symmetry/asymmetry; population model; epidemic model; dynamical behavior; simulation
(This special issue belongs to the Section Mathematics)
Topological Aspects of Quantum Gravity and Quantum Information Theory
edited by and
submission deadline 30 Jun 2025 | 2 articles | Viewed by 6364 | Submission Open
Keywords: quantum gravity; quantum information; entanglement; black holes; information paradox; ER=EPR conjecture; model building; condensed matter physics; topological phase transitions; AdS/CFT correspondence
(This special issue belongs to the Section Physics)
Symmetry in Mathematical Analysis and Functional Analysis: 3rd Edition submission deadline 30 Jun 2025 | 4 articles | Viewed by 6311 | 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)
Advances in Symmetry and Complex Systems
edited by and Qunli Lei
submission deadline 30 Jun 2025 | 3 articles | Viewed by 6004 | Submission Open
Keywords: complex systems; social physics; statistical physics; soft matter physics; symmetry; complex networks; null models; community detection; information or disease spreading; active fluids; disordered hyperuniformity; critical phenomena
(This special issue belongs to the Section Physics)
Symmetry/Asymmetry in Motor Control, Drives and Power Electronics
edited by and Qiang Tan
submission deadline 30 Jun 2025 | 2 articles | Viewed by 5232 | Submission Open
Keywords: motor; control; drive; power electronics; magnetic levitation; position detection; parameter identification
(This special issue belongs to the Section Computer)
Symmetry/Asymmetry in Wireless Communication and Sensor Networks II
edited by
submission deadline 30 Jun 2025 | 2 articles | Viewed by 4479 | Submission Open
(This special issue belongs to the Section Computer)
Symmetry in Numerical Analysis and Applied Mathematics submission deadline 30 Jun 2025 | 6 articles | Viewed by 4444 | 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)
Strongly Interacting Matter at Extreme Conditions—the Role of Symmetry Energy in Nuclear Physics and Astrophysics
edited by Odilon Lourenço, and Mariana Dutra
submission deadline 30 Jun 2025 | 2 articles | Viewed by 3966 | Submission Open
Keywords: equations of state; nuclear matter in extreme conditions; neutron stars; quark stars; hybrid stars; high-energy astrophysics; computational simulations; nuclear structure; magnetized stellar matter
(This special issue belongs to the Section Physics)
Experimental Tests of Fundamental Symmetries in Particle Physics
edited by Giulia Brunetti and Marta Torti
submission deadline 30 Jun 2025 | 2 articles | Viewed by 3592 | Submission Open
(This special issue belongs to the Section Physics)
Symmetry in Integrable Systems and Soliton Theories
edited by
submission deadline 30 Jun 2025 | 4 articles | Viewed by 3519 | Submission Open
Keywords: solutions for partial differential and integral equations; Hamiltonian structures; Darboux transformations; solitons; Lie symmetry theory; Riemann– Hilbert problems
(This special issue belongs to the Section Mathematics)
Symmetry in Reliability Engineering
edited by , Cun Shi and Xiaoyu Cui
submission deadline 30 Jun 2025 | 2 articles | Viewed by 2920 | 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)
Applications of Symmetry/Asymmetry in Information Technology
edited by
submission deadline 30 Jun 2025 | 1 articles | Viewed by 2619 | Submission Open
Keywords: symmetry; asymmetry; Internet of Things (IoT); big data; heuristic and metaheuristic; information technology
(This special issue belongs to the Section Computer)
Graphic Representation and Symmetry Applied to the Technical Historical Heritage submission deadline 30 Jun 2025 | 1 articles | Viewed by 2502 | Submission Open
Keywords: engineering graphics; architectural graphics; symmetry; technical historical heritage; ancient machines; technical drawing; descriptive geometry; computer-aided design; geometric modeling; virtual reality; augmented reality; computer animation
(This special issue belongs to the Section Engineering and Materials)
Symmetry/Asymmetry in Chaos Theory and Application
edited by , , Sen Zhang, and Xudong Gao
submission deadline 30 Jun 2025 | 3 articles | Viewed by 2471 | Submission Open
Keywords: symmetric/asymmetric memristive systems; symmetric/asymmetric neural network; symmetric/asymmetric neurons; symmetric/asymmetric/conditional symmetric attractor; chaotic oscillation; symmetry broken; coexisting attractors; offset boosting; chaotic optimization algorithm; chaos application
(This special issue belongs to the Section Mathematics)
Symmetry and Fractals: Theory and Applications
edited by and Guangying Lv
submission deadline 30 Jun 2025 | 2 articles | Viewed by 2360 | Submission Open
Keywords: symmetry; fractals; theoretical research; interdisciplinary applications; numerical methods; mathematical models
(This special issue belongs to the Section Mathematics)
Computer Vision, Pattern Recognition, Machine Learning, and Symmetry, 2nd Edition submission deadline 30 Jun 2025 | 2 articles | Viewed by 2334 | Submission Open
Keywords: computer vision; applied statistics; pattern recognition; behavior analysis; artificial intelligence; machine learning; adversarial learning; reinforcement learning; deep learning; emerging technologies (telecommunications; blockchain; Internet of Things; cyber security; digital performance; smart creativity)
(This special issue belongs to the Section Computer)
Advances in Multi-phase Flow: Symmetry, Asymmetry, and Applications
edited by Zhengwei Wang, , , Xijie Song and Wei Wang
submission deadline 30 Jun 2025 | 2 articles | Viewed by 2116 | 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)
Mathematical Analysis and Its Applications from Decision Theory to Extreme Values submission deadline 30 Jun 2025 | 1 articles | Viewed by 2054 | Submission Open
Keywords: sequence spaces; functional equations; Banach spaces; Baire category; extreme value distributions; multivariate extremes; representation of preferences; partial orders; statistical convergence; densities on the positive integers; topological vector spaces; linear operators; summability; convexity; probability measures
(This special issue belongs to the Section Mathematics)
Carbon Neutrality and Symmetry in Power Engineering and Engineering Thermophysics, 2nd Edition
edited by Longfei Chen, , Guangze Li, and Bin Zhang
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1829 | Submission Open
Keywords: carbon neutrality; power engineering; engineering thermophysics
(This special issue belongs to the Section Engineering and Materials)
Symmetry and Asymmetry in Artificial Intelligence and Machine Learning-Based Image Processing
edited by Panagiotis Adamidis and Keiko Ono
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1781 | Submission Open
Keywords: symmetry-aware deep learning; asymmetric feature detection; feature extraction; object detection; symmetry-guided attention; symmetry-based segmentation; deep feature learning; geometric invariance; pattern recognition; image segmentation; computer vision; image transformations
(This special issue belongs to the Section Computer)
Quantum Entanglement and Quantum Information in High Energy Physics
edited by Theodota Lagouri
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1689 | Submission Open
Keywords: quantum entanglement; quantum information; quantum computing; quantum machine learning
(This special issue belongs to the Section Physics)
Symmetry/Asymmetry in Evolutionary Algorithms
edited by Enrique Naredo and
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1656 | Submission Open
Keywords: genetic algorithms; genetic programming; grammatical evolution; evolutionary computation; evolutionary programming; evolution strategies; differential evolution; swarm intelligence; particle swarm optimization; artificial bee colony; ant colony optimization; artificial immune systems; memetic algorithms; large-scale optimization problems; cuckoo search algorithms; symbiotic organisms search; whale optimization algorithms; butterfly optimization algorithms; medical image processing and analysis; fundamentals of evolutionary algorithms; biometric recognition; optimization and learning methods; document analysis and recognition; video analysis and understanding; character recognition; visual applications and systems; face recognition and pose estimation; vision problems in robotics and autonomous driving; pattern classification and clustering analysis; object detection; tracking; and recognition; machine learning; action recognition; neural networks and deep learning; multimedia analysis and reasoning; feature extraction and feature selection; GPU implementation of evolutionary computing; symmetry
(This special issue belongs to the Section Computer)
Applications Based on Symmetry/Asymmetry in Data Mining
edited by and
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1405 | Submission Open
Keywords: data mining; symmetry; asymmetry; pattern recognition; anomaly detection; classification; machine learning; feature engineering; data analysis; clustering
(This special issue belongs to the Section Computer)
Lorentz Invariance Violation and Space–Time Symmetry Breaking
edited by and
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1359 | 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)
Isospin Symmetry/Asymmetry in Experimental Nuclear Physics
edited by Yelei Sun
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1230 | Submission Open
Keywords: isospin symmetry; isospin symmetry violation; isospin asymmetry; nuclear physics; nuclear reactions; nuclear structure; astrophysics
(This special issue belongs to the Section Physics)
Symmetry/Asymmetry in Mechanics of Materials
edited by and Xiaochao Chen
submission deadline 30 Jun 2025 | 2 articles | Viewed by 1214 | Submission Open
Keywords: symmetric and asymmetric characteristics; materials: composites; metals; polymers; biomaterials; functional materials; meta-materials; porous materials; etc.; methodologies: mechanical tests; microstructure observation; digital image correlation; numerical modelling; constitutive modelling; etc.; mechanics: dynamic behaviour; elastic– plastic deformation; damping ability; shock and vibration; etc.
(This special issue belongs to the Section Engineering and Materials)
Symmetry Studies in Heat and Mass Transfer
edited by Tao Wang and Seolha Kim
submission deadline 30 Jun 2025 | 2 articles | Viewed by 1209 | Submission Open
Keywords: Fundamental transport phenomena.    ; Multiphase systems.    ; Boiling and evaporation.  ; Condensation.    ; Interfacial phenomena.  ; Multiphase flow dynamics.; Advanced materials and processes.    ; Micro/nanofluidics and heat transfer.  ; Porous media transport.  ; Functional and smart materials for heat transfer.  ; Thermal management in electronic systems.; Energy systems and applications.    ; Heat exchangers and thermal systems design.  ; Renewable energy technologies (solar; geothermal).  ; Nuclear thermal hydraulics.  ; Thermal energy storage.; Computational and analytical methods.    ; Machine learning in heat and mass transfer.  ; Optimization of symmetric transfer processes.; Experimental techniques and measurements.    ; Advanced visualization methods.  ; Thermophysical property measurements.  ; Non-intrusive diagnostic techniques
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Topological Physics
edited by and Muntaser Naamneh
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1136 | Submission Open
Keywords: symmetry; topology; topological phases; topological materials; topological phase transitions; Dirac/Weyl semimetal  
(This special issue belongs to the Section Physics)
Symmetry in Next-Generation Intelligent Information Technologies
edited by , Si-Nian Jin and
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1071 | Submission Open
Keywords: artificial intelligence; wireless communication; automation control; big data; computer science
Symmetry Study in Electromagnetism: Topics and Advances
edited by , Yinhong Liao and Wei Xiao
submission deadline 30 Jun 2025 | 1 articles | Viewed by 1013 | 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 Graph Theory Ⅱ
edited by Yuefang Sun
submission deadline 30 Jun 2025 | 2 articles | Viewed by 867 | 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 in Future Wireless Networks
edited by , and Han Xiao
submission deadline 30 Jun 2025 | 1 articles | Viewed by 819 | Submission Open
Keywords: wireless networks; network architecture; network management; quality of service
(This special issue belongs to the Section Computer)
Symmetry and Cosmology
edited by and Leila Lobato Graef
submission deadline 30 Jun 2025 | 1 articles | Viewed by 741 | 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)
Fault Diagnosis and Electronic Engineering in Symmetry
edited by Yan Li
submission deadline 30 Jun 2025 | 1 articles | Viewed by 704 | 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)
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