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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 and Nonlinearity in Optics

edited by

Wiesław Leonski

and

Joanna K. Kalaga

submission deadline 31 Jul 2025 | Viewed by 204 | Submission Open

Keywords: classical optics; quantum optics; nonlinear optics; symmetry; PT-symmetry; non-Hermitian systems; nonlinear systems; nonlinear processes; quantum correlations; quantum technologies; classical chaos; quantum chaos

(This special issue belongs to the Section Physics)

Symmetry in Contemporary Cryptography

edited by Fuyou Miao

submission deadline 31 Jul 2025 | Viewed by 134 | Submission Open

Keywords: basic number theory; finite domain foundation; the relationship between common mathematical problems; various cryptography technologies

(This special issue belongs to the Section Computer)

Applications of Symmetry in Robotics and Mechanics

edited by Chunxu Tian

submission deadline 31 Jul 2025 | Viewed by 132 | Submission Open

Keywords: symmetry in robotics; symmetric mechanisms; motion planning; kinematic analysis; modular robotics; dynamic optimization; decoupled mechanisms; biomimetic systems; robotic design; symmetry applications

(This special issue belongs to the Section Computer)

Symmetry in Optimization Methods for Image Processing

edited by Ruirui Li

submission deadline 31 Jul 2025 | Viewed by 87 | Submission Open

Keywords: noise processing; sparse modeling; image segmentation; image classification; bias analysis; embedded systems; and computer vision

(This special issue belongs to the Section Computer)

Symmetry and Supernova Neutrinos in Astroparticle Physics

edited by Amir N. Khan

submission deadline 31 Jul 2025 | Viewed by 85 | Submission Open

Keywords: symmetry; neutrinos; supernova; core collapse; particle physics

(This special issue belongs to the Section Physics)

Recent Advances in Symmetry-Based Approaches to Retrieval-Augmented Generation in Large Language Models

edited by

Dae-Ki Kang

and

Sukho Lee

submission deadline 1 Aug 2025 | Viewed by 419 | Submission Open

Keywords: RAG; LLMs; symmetry-based approaches; information retrieval; optimization techniques

(This special issue belongs to the Section Computer)

Symmetry and Asymmetry in Soliton Theory

edited by Soon-Tae Hong

submission deadline 15 Aug 2025 | Viewed by 252 | Submission Open

Keywords: soliton; symmetry and asymmetry; kink and anti-kink; Skyrmion; BRST symmetry; static properties in solitons; topology; path integral

(This special issue belongs to the Section Mathematics)

Mathematical Modeling of the Infectious Diseases and Their Controls

edited by

Muhammad Altaf Khan

submission deadline 31 Aug 2025 | 15 articles | Viewed by 27419 | Submission Open

Keywords: mathematical modeling; infectious diseases; optimal controls; fractional operators; numerical methods

(This special issue belongs to the Section Mathematics)

Symmetry or Asymmetry in Machine Learning

edited by

Shuang Xu

submission deadline 31 Aug 2025 | 3 articles | Viewed by 16901 | Submission Open

Keywords: machine learning; deep learning; computational statistics; artificial intelligence; data mining

(This special issue belongs to the Section Computer)

Symmetry and Approximation Methods II

edited by

Simon Gluzman

submission deadline 31 Aug 2025 | 5 articles | Viewed by 15052 | Submission Open

(This special issue belongs to the Section Mathematics)

Symmetry in Graph Algorithms and Graph Theory III

edited by

Manuel Lafond

submission deadline 31 Aug 2025 | 8 articles | Viewed by 12257 | Submission Open

(This special issue belongs to the Section Computer)

New Trends on the Mathematical Models and Solitons Arising in Real-World Problems, 2nd Edition

edited by

Haci Mehmet Baskonus

submission deadline 31 Aug 2025 | 10 articles | Viewed by 12076 | 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)

Computational Intelligence and Soft Computing: Recent Applications—Second Volume

edited by

László T. Kóczy

submission deadline 31 Aug 2025 | 5 articles | Viewed by 10415 | Submission Open

Keywords: computational intelligence; soft computing; fuzzy systems; artificial neural networks; connectionist systems; evolutionary algorithms; memetic algorithms; subjective probability; cognitive systems; deep learning; industrial applications; biomedical applications; logistics applications; environmental science applications; management science applications; decision support applications; image processing applications; modeling and algorithms

(This special issue belongs to the Section Computer)

Symmetry in Hadron Physics

edited by

Jialun Ping

submission deadline 31 Aug 2025 | 8 articles | Viewed by 9342 | Submission Open

Keywords: hadrons; quantum chromodynamics; baryon spectrum; meson spectrum; multiquark states; exotic states

(This special issue belongs to the Section Physics)

Symmetry in Power Systems and Thermal Engineering

edited by

Chih Ping Tso

and Gooi Mee Chen

submission deadline 31 Aug 2025 | 3 articles | Viewed by 7706 | Submission Open

Keywords: thermal power systems; energies; thermal science; thermal engineering; thermal management

(This special issue belongs to the Section Engineering and Materials)

Symmetry in Green Technologies: Design, Optimization, and Applications

edited by

Julio Cesar Rosas Caro

and

Zoltán Ádám Tamus

submission deadline 31 Aug 2025 | 3 articles | Viewed by 6890 | Submission Open

Keywords: electricity generation with photovoltaic (PV) panels and/or fuel cell (FC) stacks; symmetric power electronics converters such as double dual topologies; power electronics topologies with symmetric switching ripple cancellation; optimization and management of resources in industrial applications; mathematical models for the optimization of symmetric or balanced phenomena; heuristic optimization algorithms and applications; metaheuristic optimization algorithms and applications; new optimization algorithms and applications; optimization of resources in industrial applications

(This special issue belongs to the Section Engineering and Materials)

Fuzzy Set Theory and Uncertainty Theory—3rd Edition

edited by

Jian Zhou

Ke Wang

and

Yuanyuan Liu

submission deadline 31 Aug 2025 | 5 articles | Viewed by 6819 | Submission Open

Keywords: intelligent algorithms for solving fuzzy/uncertain optimization problems; properties of fuzzy optimal solutions; fuzzy linear/non-linear regression; fuzzy/uncertain clustering; fuzzy/uncertain risk management; fuzzy/uncertian reliability analysis; fuzzy/uncertain joint replenishment problem; fuzzy optimization in product design

(This special issue belongs to the Section Mathematics)

Symmetry/Asymmetry in Neural Networks

edited by Yufeng Tian and

Zhenghong Jin

submission deadline 31 Aug 2025 | 3 articles | Viewed by 6360 | Submission Open

Keywords: neural network model; stability analysis of neural networks; state estimation on neural networks; neural networks and deep learning; neural networks and their applications in robotics

(This special issue belongs to the Section Computer)

Symmetry in Computational Mathematics and Biophysics

edited by

Chuan Li

submission deadline 31 Aug 2025 | 3 articles | Viewed by 5664 | Submission Open

Keywords: biophysics; mathematical biology; computational mathematics; mathematical modeling; numerical methods for solving ordinary and partial differential equations; computing algorithms

(This special issue belongs to the Section Mathematics)

Symmetry and Asymmetry in Embedded Systems

edited by Cheng Ji, Chao Wu and Geng Yuan

submission deadline 31 Aug 2025 | 7 articles | Viewed by 4869 | Submission Open

Keywords: edge computing; symmetric system; cloud– edge converged computing; artificial intelligence; power efficiency; training optimization; privacy-preserving; federated learning; transfer learning; lifelong learning

(This special issue belongs to the Section Computer)

Recent Advance in Mathematical Physics II

edited by

Antonio Masiello

submission deadline 31 Aug 2025 | 5 articles | Viewed by 4818 | Submission Open

(This special issue belongs to the Section Mathematics)

Symmetry/Asymmetry in Ocean Engineering

edited by

Youjiang Wang

Luofeng Huang

and

Liangliang Lu

submission deadline 31 Aug 2025 | 2 articles | Viewed by 3314 | Submission Open

Keywords: hydrodynamics; hull design; offshore structure; wave loads; propulsion system; sustainable solution

(This special issue belongs to the Section Engineering and Materials)

Symmetry and Its Applications in Image Processing

edited by José Luis Vázquez-Noguera, Horacio Legal-Ayala and

Julio César Mello-Román

submission deadline 31 Aug 2025 | 3 articles | Viewed by 3264 | Submission Open

Keywords: symmetry; image processing; visual data analysis; symmetric algorithms; pattern recognition; computational imaging; symmetry detection; feature extraction; symmetric patterns; symmetry-based transformations

(This special issue belongs to the Section Computer)

Symmetry/Asymmetry in Neural Networks and Applications

edited by

Peishun Liu

and

Ruichun Tang

submission deadline 31 Aug 2025 | 2 articles | Viewed by 3262 | Submission Open

Keywords: neural network; artificial intelligence; deep learning; adversarial learning; self-supervised learning; feature engineering

(This special issue belongs to the Section Computer)

Symmetry in Data Sciences and Machine Learning for Multidisciplinary Research

edited by

Marco Antonio Márquez-Vera

Ming Li

and

Eric Simancas-Acevedo

submission deadline 31 Aug 2025 | 2 articles | Viewed by 2687 | Submission Open

Keywords: symmetry; asymmetry; data analysis; machine learning; data mining; fault diagnosis; spiking neural networks; swarm intelligence; data distribution

(This special issue belongs to the Section Computer)

Recent Advances of Symmetry in Computational Fluid Dynamics

edited by Zhan Ma and

Constantin Fetecau

submission deadline 31 Aug 2025 | 2 articles | Viewed by 2151 | Submission Open

Keywords: computational fluid dynamics; numerical simulations; symmetric conditions; aerodynamics; heat transfer; design optimization; machine learning; turbulence modeling

(This special issue belongs to the Section Mathematics)

Advances in Control Systems and Symmetry/Asymmetry

edited by Yiming Wu

submission deadline 31 Aug 2025 | 1 articles | Viewed by 1951 | Submission Open

Keywords: symmetric/asymmetric control constraints; intelligent optimal control; neural-network-based control; event-triggered control; adaptive iterative learning control; nonlinear tracking control; robust control; stochastic system control

(This special issue belongs to the Section Computer)

Symmetry/Asymmetry in Image Processing and Computer Vision

edited by

Xingbo Dong

and Shuo Yang

submission deadline 31 Aug 2025 | 2 articles | Viewed by 1736 | Submission Open

Keywords: image processing; computer vision; pattern recognition; object detection; image segmentation; deep learning; machine learning; convolutional neural network

(This special issue belongs to the Section Computer)

The Symmetry of QCD Matter and Functional QCD Approaches

edited by Fei Gao and Yu-xin Liu

submission deadline 31 Aug 2025 | Viewed by 1644 | Submission Open

Keywords: QCD phase transition; ; hadron spectrum and inside structure; ; dynamical Chiral symmetry breaking; ; deconfinement; ; functional QCD approaches.

(This special issue belongs to the Section Physics)

Symmetry in Bearing Modeling and Intelligent Fault Diagnosis

edited by

Jiantao Lu

Xingxing Jiang

and Jie Liu

submission deadline 31 Aug 2025 | 1 articles | Viewed by 1642 | Submission Open

Keywords: symmetry in bearing modeling; intelligent fault diagnosis; data-driven fault diagnosis method; interpretable intelligent diagnosis; transfer learning; active learning

(This special issue belongs to the Section Engineering and Materials)

Symmetry and Asymmetry in Data Analysis

edited by Song Deng, Xiong Fu and

Di Wu

submission deadline 31 Aug 2025 | 2 articles | Viewed by 1127 | Submission Open

Keywords: data mining; machine learning; artificial intelligence; data analysis for industrial information; outlier identification; data distribution

(This special issue belongs to the Section Computer)

Symmetry/Asymmetry in Computer Vision and Pattern Recognition for Sensing Smart Cities

edited by

Hugo Jiménez Hernández

Jorge Domingo Mendiola-Santibáñez

and Ana Marcela Herrera-Navarro

submission deadline 31 Aug 2025 | 1 articles | Viewed by 974 | Submission Open

Keywords: computer vision systems; pattern recognition; symmetry and asymmetry; smart cities; video understanding; video analytics; smart sensing

(This special issue belongs to the Section Computer)

Individual Differences in Behavioral and Neural Lateralization, 2nd Edition

edited by

Anita D'Anselmo

, Elena Mussini and

Daniele Marzoli

submission deadline 31 Aug 2025 | 1 articles | Viewed by 763 | Submission Open

Keywords: behavioral lateralization; neural lateralization; individual differences; mental disorders; atypical lateralization; handedness; motor asymmetries; perceptual and attentional asymmetries; sex; age; personality; sexual orientation; cognitive performance; genetics

(This special issue belongs to the Section Life Sciences)

Symmetry Applied in Mathematical Modeling and Computational Methods

edited by

Luis Acedo

submission deadline 31 Aug 2025 | Viewed by 450 | Submission Open

Keywords: neural networks; symplectic methods; optimal control theory; symmetries in mathematical models; gauge theories; symmetry breaking models

(This special issue belongs to the Section Mathematics)

Developments in Mechanical Engineering and Symmetry

edited by Fuqiang Chen and

Bo Hu

submission deadline 31 Aug 2025 | Viewed by 384 | Submission Open

Keywords: symmetry analysis; aerodynamic; acoustic; flow control; fluid dynamics; optimal design; computational fluid dynamics; structural control

(This special issue belongs to the Section Engineering and Materials)

Symmetry in Marine Hydrodynamics: Applications to Ocean Engineering

edited by

Sarat Chandra Mohapatra

and

Mike Meylan

submission deadline 31 Aug 2025 | Viewed by 355 | Submission Open

Keywords: hydrodynamics; marine structures; hydroelastic response; dynamics of moored platforms; interconnected structures; wave forces; marine aquaculture; effect of seabed topography; nonlinear dynamics; wave energy converter

(This special issue belongs to the Section Engineering and Materials)

Symmetry-Based Properties in Two-Dimensional Materials

edited by

Sake Wang

Minglei Sun

and

Nguyen Tuan Hung

submission deadline 31 Aug 2025 | Viewed by 341 | Submission Open

Keywords: two-dimensional materials; time-reversal symmetry; inversion symmetry; mirror symmetry; topological states; optical properties; mechanical properties

(This special issue belongs to the Section Engineering and Materials)

Quantum Technologies in Computing, Communication, Sensing and Imaging

edited by

Aleksey Kozikov

submission deadline 31 Aug 2025 | Viewed by 340 | Submission Open

Keywords: quantum computing; quantum communication; quantum sensing; quantum imaging; quantum networks; quantum internet; superposition; entanglement; single photons; single electrons; single spins; trapped ions and atoms; qubits; qudits; simulations; cryptography; quantum key distribution

(This special issue belongs to the Section Physics)

Symmetry or Asymmetry in Signal/Image Processing, Pattern Recognition, and Microwave/Millimeter-Wave Technologies

edited by

Baolong Wu

and Yiming Yu

submission deadline 31 Aug 2025 | Viewed by 309 | Submission Open

Keywords: signal processing; image processing; pattern recognition; machine learning; microwave/millimeter-wave technologies

(This special issue belongs to the Section Computer)

Quantum Synchronization of Oscillators and Qubits

edited by

Giovanni Modanese

submission deadline 31 Aug 2025 | Viewed by 267 | Submission Open

Keywords: synchronization; quantum synchronization; quantum symmetry; superradiance; quantum optics; entanglement

(This special issue belongs to the Section Physics)

Symmetry in Optimization Algorithms and Applications

edited by

Adrián González

submission deadline 31 Aug 2025 | Viewed by 249 | Submission Open

Keywords: symmetry; optimization algorithms; problem simplification; search space reduction; algorithm efficiency; symmetry breaking; mathematical programming; combinatorial optimization; convergence acceleration

(This special issue belongs to the Section Mathematics)

Symmetry and Asymmetry in Object Detection, Object Tracking, and Behaviour Understanding

edited by Mohamed Naiel

submission deadline 31 Aug 2025 | Viewed by 246 | Submission Open

Keywords: object detection; pose estimation; multi-object tracking; object tracking; behaviour recognition; action recognition; activity recognition

(This special issue belongs to the Section Computer)

Modeling and Simulation of Mechanical Systems and Symmetry

edited by Ciro Tordela

submission deadline 31 Aug 2025 | Viewed by 205 | 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)

Stability and Bifurcation in Discrete Dynamical Systems: Application to Population Dynamics

edited by

Rafael Luís

submission deadline 31 Aug 2025 | Viewed by 203 | Submission Open

Keywords: discrete dynamical systems; difference equations; population dynamics; autonomous models; nonautonomous periodic models; evolutionary models; local stability; global stability; bifurcation

(This special issue belongs to the Section Mathematics)

Exploring Symmetry and Asymmetry in Supply Chain Management: Frameworks, Applications and Innovations for Resilient and Sustainable Systems

edited by

Jabir Arif

and

Fouad Jawab

submission deadline 31 Aug 2025 | Viewed by 175 | Submission Open

Keywords: supply chain symmetry; asymmetry in logistics networks; resilient supply chains; sustainable supply chain systems; mathematical modeling in scm; optimization techniques; risk management in supply chains; collaborative supply chain frameworks; innovation in logistics; resilient supply chain design

(This special issue belongs to the Section Computer)

Symmetry and Asymmetry in Dynamics and Control of Biomimetic Robots

edited by

Huan Shen

Jiajun Xu

and

Guodong Qin

submission deadline 31 Aug 2025 | Viewed by 148 | Submission Open

Keywords: biomimetic robotics; bioinspired structure; flexible actuation; intelligent control; symmetry in robotics; asymmetry motion modeling

(This special issue belongs to the Section Engineering and Materials)

Symmetry in the Dark: Unification of Dark Matter and Dark Energy

edited by Fotios Anagnostopoulos

submission deadline 15 Sep 2025 | Viewed by 307 | Submission Open

Keywords: modified gravity; dark matter; dark energy; interacting dark energy (DE); clustering dark energy (DE); galaxy rotation curves; large-scale structure; gravitational waves; dark energy/dark matter (DE/DM) unification

(This special issue belongs to the Section Physics)

Symmetry in Mechanical Engineering: Properties and Applications

edited by

Yunqing Tang

, Kun Xu and

Bing Yang

submission deadline 30 Sep 2025 | 11 articles | Viewed by 20165 | Submission Open

Keywords: mechanical engineering; symmetric structure; asymmetric structure; mechanical design; machining; MEMS; structural reliability; thermal management; mass transfer; topology optimization

(This special issue belongs to the Section Engineering and Materials)

Aspects of Particle Physics and High Energy Physics- Dedicated to Zhengdao Li's 95 Anniversary

edited by

Tomohiro Inagaki