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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Noether Symmetries in Modified Gravity and Their Cosmological Consequences submission deadline 30 Sep 2026 | Viewed by 354 | Submission Open
Keywords: noether symmetries; modified theories of gravity; cosmic inflation and primordial perturbations; cosmic microwave background radiation; symmetry breaking in the early universe; topological defects; primordial black holes; stochastic and continuous gravitational waves; compact binary inspirals; big Bang nucleosynthesis; gravitational lensing; dark energy and dark matter models; black hole physics and related issues; wormholes
(This special issue belongs to the Section Physics)
Nanomechanics and Symmetry in Quantum Signal Processing—Theory and Application
edited by
submission deadline 30 Sep 2026 | Viewed by 326 | Submission Open
Keywords: nanomechanics; nanoelectromechanical systems (NEMSs); quantum optomechanics; cavity quantum electrodynamics; cat states; quantum information; quantum networks; quantum sensing; quantum error correction; quantum entanglement
(This special issue belongs to the Section Physics)
Symmetry in Clean Energy Systems: Recent Developments and Future Directions Towards AI submission deadline 30 Sep 2026 | Viewed by 310 | Submission Open
Keywords: load profile analysis; RES design; and simulation; hybrid RES with electrical/thermal energy storage system; uninterrupted power flow and grid stability through a smart microgrid; harmonic distortion control and management; active and reactive power management; anomaly and fault detection using ML and DL; energy demand and generation power forecasting; RES health monitoring and predictive maintenance; real-time data-sourced supervised learning models for grid stability; AI-driven decision making and deployment of robots for fault attendance; economic and environmental analysis
(This special issue belongs to the Section Engineering and Materials)
Applications Based on Symmetry in Nanomaterials
edited by
submission deadline 30 Sep 2026 | Viewed by 306 | Submission Open
Keywords: symmetry; nanomaterials; nanostructures; crystallographic symmetry; functional nanomaterials; metamaterials; energy materials; magnetic nanomaterials; optoelectronic properties; structure– property relationships
(This special issue belongs to the Section Engineering and Materials)
Symmetry/Asymmetry in Photocatalysis submission deadline 30 Sep 2026 | Viewed by 249 | Submission Open
Keywords: materials science; nanomaterials; materials synthesis; characterization; photocatalysts; toxic dyes; pollutants; wastewater
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry and Chirality in Functional Nanomaterials
edited by
submission deadline 30 Sep 2026 | Viewed by 244 | Submission Open
Keywords: chiral nanomaterials; symmetry-engineered nanostructures; sensing devices; flexible/wearable electronics; medical devices; electronic and spintronic devices
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry/Asymmetry in Cryptographic Approach for Privacy-Preserving Data Transmission and Data Analysis submission deadline 30 Sep 2026 | Viewed by 241 | Submission Open
Keywords: privacy-preserving technology; privacy-enhancing techniques; federated learning; cross-border federated computing; cryptography; post-quantum cryptography; financial applications; healthcare applications; privacy-preserving GenAI/LLM/Agentic AI applications; cybersecurity
(This special issue belongs to the Section Computer)
Symmetry and Asymmetry in AI-Driven Supply Chain Transformation: Trends, Innovations, and Future Directions
edited by and
submission deadline 30 Sep 2026 | Viewed by 234 | Submission Open
Keywords: artificial intelligence; supply chain management; symmetry; asymmetry; digital transformation; sustainable operations
(This special issue belongs to the Section Computer)
Symmetry and Asymmetry in Big Data Analytics submission deadline 30 Sep 2026 | Viewed by 232 | Submission Open
Keywords: symmetry and asymmetry; invariance; entropy and information theory; complex networks; big data analytics; informational asymmetry; data governance; decision support systems
(This special issue belongs to the Section Computer)
Symmetry and Structural Effects in Advanced Energy Storage Materials
edited by Ana Vassileva Borissova and
submission deadline 30 Sep 2026 | Viewed by 227 | Submission Open
Keywords: symmetry in materials; structural effects; symmetry breaking; phase transitions; hydrogen storage materials; metal and complex hydrides; solid-state materials; metal-ion batteries; anode-free batteries; electrochemical performance; thermodynamic and kinetic modelling; advanced energy storage systems
(This special issue belongs to the Section Engineering and Materials)
Quantum Gravity and Gravitational Wave
edited by Carlos Frajuca
submission deadline 30 Sep 2026 | Viewed by 225 | Submission Open
Keywords: symmetries in gravitation; symmetries in quantum gravity; preserving properties in gravitation; symmetries in general relativity
(This special issue belongs to the Section Physics)
Computational Intelligence and Soft Computing: Recent Applications—Third Volume
edited by
submission deadline 30 Sep 2026 | Viewed by 224 | Submission Open
Keywords: computational intelligence soft computing; fuzzy systems; artificial neural networks; evolutionary; population-based; memetic algorithms; cognitive computing
(This special issue belongs to the Section Computer)
Advances in Physical & Theoretical Chemistry with Symmetry/Asymmetry
edited by
submission deadline 30 Sep 2026 | Viewed by 223 | Submission Open
Keywords: symmetry; chirality; group theory; asymmetric catalysis; spectroscopic selection rules; molecular electronic structure; piezoelectric devices; symmetry breaking; nonlinear optics
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Applications Based on Symmetry in Metal Materials submission deadline 30 Sep 2026 | Viewed by 223 | Submission Open
Keywords: symmetry in metal materials; crystallographic symmetry; microstructure– property relationships; anisotropy and symmetry breaking; computational modeling
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Algorithm and Decision-Making
edited by and Marko Jelocnik
submission deadline 30 Sep 2026 | Viewed by 221 | Submission Open
Keywords: symmetry; algorithms; decision-making; multi-criteria decision making; invariance; optimization; fairness; computational models
(This special issue belongs to the Section Mathematics)
Functional Analysis and Fixed Points
edited by Luoyi Shi and Ziheng Zhang
submission deadline 30 Sep 2026 | Viewed by 189 | Submission Open
Keywords: fixed-point theory; iterative algorithm; metric fixed-point theory; topological methods; operator theory; operator algebra; variational principles; Banach space geometry; applications to differential equations
(This special issue belongs to the Section Mathematics)
Symmetry in Catalyst and Materials Processing of Energy Conversion Systems
edited by Qian Ouyang
submission deadline 30 Sep 2026 | Viewed by 188 | Submission Open
Keywords: symmetry engineering; catalysts and functional materials; energy conversion systems; materials processing; surface and interfacial symmetry; porous and multiphase media; CO2  capture and storage; gas hydrates; mass transport
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Network and System Security
edited by Weiwei Liu
submission deadline 30 Sep 2026 | Viewed by 184 | Submission Open
Keywords: artificial intelligence security; data security; privacy preservation; power information security; symmetric cryptography; network intrusion detection; network security
(This special issue belongs to the Section Computer)
Symmetry and Asymmetry in Design of Bioactive Agents and Chemical Biology
edited by
submission deadline 30 Sep 2026 | Viewed by 171 | Submission Open
Keywords: chirality; chiral nature of biological targets; structural characterization of receptors; enzymes; and other chiral targets of bioactive agents; drugs; agrochemicals; natural compounds; asymmetric synthesis; analytical techniques suitable for the study of chiral compounds; chiral separation; pharmacophore; targets; in silico-– computational/in vitro/in vivo studies; asymmetry in nanosciences; legislation and guidelines; chemical biology
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry in Intelligent Algorithms: 2nd Edition
edited by Hongwei Kang and Xinping Sun
submission deadline 30 Sep 2026 | Viewed by 163 | Submission Open
Keywords: symmetry; intelligent algorithms; swarm intelligence; evolutionary computation; machine learning; deep learning; large language models (LLMs); transformers; neural architecture design; optimization; algorithmic fairness; hybrid models; multimodal AI; explainable AI; robustness
(This special issue belongs to the Section Computer)
Applied Symmetry in Cryptography and Information Security
edited by Funminiyi Olajide, Nemitari Ajienka and
submission deadline 30 Sep 2026 | Viewed by 154 | Submission Open
Keywords: cybersecurity governance; cloud security; digital forensics; artificial intelligence security; cybercrime; privacy engineering; digital resilience; regulatory compliance; secure digital transformation; symmetrical interactions
(This special issue belongs to the Section Computer)
Symmetry and Asymmetry in Wastewater Treatment and Bioenergy Recovery Systems submission deadline 30 Sep 2026 | Viewed by 125 | Submission Open
Keywords: symmetry/asymmetry; wastewater biorefinery; bioenergy recovery; anaerobic membrane bioreactor (AnMBR); anaerobic digestion intensification; biogas upgrading and biomethane; hydrogen from wastewater (MECs); microalgae– bacteria consortia; granular sludge and biofilms; nutrient recovery (N/P/K); struvite crystallization; hydrothermal liquefaction (HTL) of sludge; emerging contaminants (PFAS); membrane fouling control; techno-economic analysis (TEA); life-cycle assessment (LCA)
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry/Asymmetry in Fuzzy Multi-Criteria Decision-Making: Application in Management and Engineering submission deadline 1 Oct 2026 | 1 articles | Viewed by 920 | Submission Open
Keywords: multi-criteria decision-making; classical fuzzy number; interval fuzzy number; Z– number; intuitionistic fuzzy numbers; q-rung orthopair fuzzy numbers; spherical fuzzy numbers; hesitant fuzzy numbers; Pythagorean fuzzy numbers; fuzzy agregation operators; ANFIS; FIS; management; engineering
Symmetry and Asymmetry in Computer Algorithms: Properties and Applications
edited by Yoan Martínez López, and Julio Madera Quintana
submission deadline 1 Oct 2026 | Viewed by 358 | Submission Open
Keywords: symmetry and asymmetry; algorithm design; applied optimization; evolutionary computation; machine learning and artificial intelligence; data mining; real-world problem solving; large-scale data analysis; smart systems and applications; bioinspired and nature-based algorithms
(This special issue belongs to the Section Computer)
Asymmetric and Symmetric in Deep Computer Vision and Generative Modeling submission deadline 31 Oct 2026 | 9 articles | Viewed by 25508 | Submission Open
Keywords: deep computer vision; generative models and GANs; symmetry and asymmetry in neural networks; feature extraction and representation learning; synthetic data generation; cross-domain applications; data augmentation and transfer learning; model robustness and interpretability
(This special issue belongs to the Section Computer)
Gravitational Physics and Symmetry submission deadline 31 Oct 2026 | 7 articles | Viewed by 11807 | Submission Open
Keywords: gravitational waves and their detection; black hole physics and singularities; cosmology and the large-scale structure of the universe; theoretical developments in general relativity; symmetry principles in gravitational theories; quantum gravity and the unification of forces; experimental tests of gravitational theories; applications of symmetry in particle physics and cosmology; mathematical frameworks for symmetry and gravitation; interdisciplinary approaches to gravitational physics and symmetry
(This special issue belongs to the Section Physics)
Symmetry/Asymmetry in Advanced Research for Efficient Electric Vehicles
edited by
submission deadline 31 Oct 2026 | 2 articles | Viewed by 10154 | Submission Open
Keywords: electric vehicles (xEVs); electric motor; battery; power electronics; HVAC; thermal management; energy management; energy storage; optimization; heating; cooling; symmetry; asymmetry
(This special issue belongs to the Section Computer)
Symmetry in Fractional Derivatives, Fractional Equations and Fractional Order Systems
edited by Xiaoling Han and Chenghua Gao
submission deadline 31 Oct 2026 | 9 articles | Viewed by 7214 | 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 in Solving NP-Hard Problems
edited by Luka Fürst and Uroš Čibej
submission deadline 31 Oct 2026 | 4 articles | Viewed by 6649 | Submission Open
Keywords: symmetry; NP-hard problems; NP-complete problems; combinatorial optimization; graph theory; complete search; dynamic programming; metaheuristics; evolutionary algorithms
(This special issue belongs to the Section Computer)
Symmetry/Asymmetry in Evolutionary Computation and Machine Learning
edited by and Leilei Cao
submission deadline 31 Oct 2026 | 4 articles | Viewed by 5775 | Submission Open
Keywords: evolutionary computation; machine learning; swarm intelligence; bio-inspired optimization; pattern classification and clustering analysis; symmetry in evolutionary single-objective and multi-objective optimization; symmetry in regularization techniques; symmetry in data augmentation; symmetry in neural networks and deep learning; symmetry and asymmetric similarity measures
(This special issue belongs to the Section Computer)
Symmetry and Metaheuristic Algorithms
edited by
submission deadline 31 Oct 2026 | 5 articles | Viewed by 5491 | Submission Open
Keywords: symmetry-based optimization; the improvement in traditional metaheuristic algorithms (pso; sa; de; etc.) using new mechanisms; new metaheuristic algorithms; hybridization of metaheuristic methods; multi-objective optimization; theoretical insights into metaheuristic algorithms; metaheuristics in artificial intelligence and machine learning; metaheuristics for image processing; metaheuristic applications in healthcare and biomedical engineering; emerging trends and future directions in metaheuristic research
(This special issue belongs to the Section Computer)
Symmetry and Asymmetry in Natural Language Processing
edited by Yang Li and Junwen Duan
submission deadline 31 Oct 2026 | 3 articles | Viewed by 4146 | Submission Open
Keywords: deep learning; natural language processing; large language model; multimodal model
(This special issue belongs to the Section Computer)
New Trends on the Mathematical Models and Solitons Arising in Real-World Problems, 3rd Edition submission deadline 31 Oct 2026 | 5 articles | Viewed by 3714 | Submission Open
Keywords: mathematical physics; partial differential equations; epidemic models; basic reproduction number; fractional differential equations; dynamical systems; stability analysis; bifurcation; optimal control
(This special issue belongs to the Section Mathematics)
Microphysics Meets Astrophysics: Understanding Dense Matter Through Compact Objects
edited by Ignacio Francisco Ranea-Sandoval and
submission deadline 31 Oct 2026 | 3 articles | Viewed by 3676 | Submission Open
Keywords: neutron stars; hybrid stars; equation of state; dense matter; gravitational waves; hadron– quark phase transition; non-radial oscillation modes; dark matter in compact objects; quark stars
(This special issue belongs to the Section Physics)
Symmetry in Mathematical Physics: Current Topics and Recent Advances—in Honour of Professor Jean-Pierre Gazeau on the Occasion of His 80th Birthday
edited by , and Mariano A. del Olmo
submission deadline 31 Oct 2026 | 7 articles | Viewed by 3652 | Submission Open
Keywords: symmetries in classical and quantum models; group representations; conformal field theory; integrable systems; gauge theories; symmetry breaking; quantum optics; coherent states; signal processing; aperiodic systems
(This special issue belongs to the Section Physics)
Neutrino Physics and Symmetries
edited by Eduardo Bauer, and Jiajie Ling
submission deadline 31 Oct 2026 | 2 articles | Viewed by 3587 | Submission Open
Keywords: lepton number symmetry; CP symmetry violation; see-saw model; scale-invariant models; supersymmetric models; radiative mechanisms (Zee and Ma models); minimal flavor violation (MFV) models; sterile neutrinos; double-beta decay; neutrino detectors
(This special issue belongs to the Section Physics)
Advances of Asymmetry/Symmetry in High Energy Physics
edited by , and Paulo José Ferreira Porfírio da Silva
submission deadline 31 Oct 2026 | 3 articles | Viewed by 3193 | Submission Open
Keywords: anomalies in QFT; supersymmetry; baryogenesis; spontaneous and explicit symmetry breaking; Lorentz and CPT violation; space-time symmetries; renormalization and symmetries; standard model extension
(This special issue belongs to the Section Physics)
Symmetry/Asymmetry in Goodness-of-Fit Testing and Statistical Inference Using Non-Parametric Approaches submission deadline 31 Oct 2026 | 3 articles | Viewed by 3148 | Submission Open
Keywords: goodness-of-fit testing; non-parametric statistics; empirical likelihood; survival analysis; censored data; fuzzy; test for symmetry; optimization algorithms; Monte Carlo simulations
(This special issue belongs to the Section Mathematics)
Symmetry and Asymmetry in CFD, Fluid Dynamics, and Heat Transfer: Theoretical and Computational Perspectives
edited by
submission deadline 31 Oct 2026 | 1 articles | Viewed by 2479 | Submission Open
Keywords: computational fluid dynamics (CFD); symmetry and asymmetry in fluid mechanics; heat transfer optimization; turbulence modeling and vortex dynamics; numerical methods in thermal and fluid systems; group theory applications in fluid dynamics; energy-efficient thermal management; multiphase and non-Newtonian fluid flows; convective and conductive heat transfer
(This special issue belongs to the Section Mathematics)
Power Supply-Demand Asymmetry and Power Quality Issues in High-Renewable Energy Power Systems
edited by and
submission deadline 31 Oct 2026 | 3 articles | Viewed by 2182 | Submission Open
Keywords: voltage sag; harmonic responsibility; harmonic power; supraharmonic; integrated energy system; power quality data; power flow analysis; interference modeling; power quality analysis; multi-energy flow coupling; hydrogen storage characteristics; electric carbon market
(This special issue belongs to the Section Engineering and Materials)
Advances in Nuclear Physics and Symmetry
edited by , Mustapha Oulne and Petrică Buganu
submission deadline 31 Oct 2026 | 3 articles | Viewed by 1996 | Submission Open
Keywords: nuclear deformation; nuclear symmetry; shape coexistence; phase transitions; critical point symmetries; collective models; microscopic models; nuclear structure; experimental nuclear physics; geometric and algebraic symmetries
(This special issue belongs to the Section Physics)
Modeling and Simulation of Mechanical Systems and Symmetry
edited by
submission deadline 31 Oct 2026 | 2 articles | Viewed by 1920 | Submission Open
Keywords: dynamics; model-based estimation; model-based control; vehicle dynamics; symmetric dynamic behaviour; multibody
(This special issue belongs to the Section Engineering and Materials)
Applications Based on Symmetry and Asymmetry in Structural and Geotechnical Engineering
edited by Wenkun Yang and Yangtao Li
submission deadline 31 Oct 2026 | 3 articles | Viewed by 1624 | Submission Open
Keywords: rock or rock-like materials; symmetry/asymmetry; computer vision; machine learning; homogeneity/anisotropy; data-driven methods; multi-scale mechanical analysis
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Civil Transportation Engineering—2nd Edition
edited by and Renliang Shan
submission deadline 31 Oct 2026 | 1 articles | Viewed by 1573 | Submission Open
Keywords: new building structural systems; excavation and support of large cross-section tunnels; PBA construction method; surrounding rock– support interaction; surface settlement during tunnel excavation; new technologies for geotechnical testing; mechanical properties of frozen rock and soil; environmental geotechnical engineering
(This special issue belongs to the Section Engineering and Materials)
Symmetry in Artificial Intelligence and Machine Learning: Current Advances
edited by , , and Tianzi Zang
submission deadline 31 Oct 2026 | 1 articles | Viewed by 1343 | Submission Open
Keywords: artificial intelligence; machine learning; deep learning; symmetry; data mining; computer vision; natural language processing
(This special issue belongs to the Section Computer)
Symmetry-Inspired Approaches in Control, Robotics, and Intelligent Systems submission deadline 31 Oct 2026 | 1 articles | Viewed by 1211 | Submission Open
Keywords: symmetry in control systems; asymmetric control strategies; intelligent control; fuzzy logic and neuro-fuzzy systems; model predictive control (MPC); robust and adaptive control; reinforcement learning for control; evolutionary and metaheuristic optimization; robotics; multi-agent and swarm systems; cyber-physical systems; fault-tolerant and resilient control; bio-inspired and symmetry-based  algorithms; system identification and dynamic modeling; motion planning and trajectory control; mechatronics systems
(This special issue belongs to the Section Computer)
Symmetry and Nonlinear Control: Theory and Application
edited by
submission deadline 31 Oct 2026 | 3 articles | Viewed by 1168 | Submission Open
Keywords: symmetry; nonlinear control; invariant systems; dynamical systems; observer design; robust control; adaptive control; control theory; engineering applications
(This special issue belongs to the Section Engineering and Materials)
Symmetry and Textured Ceramics submission deadline 31 Oct 2026 | 1 articles | Viewed by 930 | Submission Open
Keywords: crystallographic texture; polycrystalline ceramics; columnar or tabular grains; noncubic optical ceramics; ionic conduction; microstructural anisotropy; electrical conductivity; dielectric properties
(This special issue belongs to the Section Chemistry: Symmetry/Asymmetry)
Symmetry and Asymmetry on Artificial Neural Networks for Visual Learning
edited by and
submission deadline 31 Oct 2026 | Viewed by 653 | Submission Open
Keywords: artificial intelligence; computer vision; image processing; pattern recognition; machine learning; deep learning; artificial neural networks
(This special issue belongs to the Section Computer)
Nuclear Physics and Symmetry/Asymmetry: Advances and Prospects
edited by
submission deadline 31 Oct 2026 | 1 articles | Viewed by 638 | Submission Open
Keywords: nuclear physics; phase transitions; QCD; neutrino; dense matter; exotic nuclei; cluster dynamics
(This special issue belongs to the Section Physics)
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