Special Issues

Fractal and Fractional 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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Applied Fractional Calculus in Machine Learning and Biomedical Engineering
edited by
submission deadline 31 Oct 2025 | 1 articles | Viewed by 1698 | Submission Open
Keywords: fractional-order machine learning algorithms; application of fractional calculus in deep learning; including novel architectures and training methods; fractional calculus in biomedical signal processing (EEG; ECG; MRI; etc.); modelling of biological phenomena using fractional differential equations; fractional-order control systems in biomedical devices; fractional calculus in the analysis of biomedical data and its integration with ML techniques; comparative studies between integer-order and fractional-order methods in ML and BME; practical challenges in applying FC to real-world problems in ML and BME
(This special issue belongs to the Section Optimization, Big Data, and AI/ML)
Multiscale Fractal Analysis in Unconventional Reservoirs
edited by
submission deadline 31 Oct 2025 | 3 articles | Viewed by 1625 | Submission Open
Keywords: multiscale fractal analysis; unconventional reservoirs; fractal geometry; fracture network characterization; pore structure analysis; fluid flow modeling; reservoir simulation; machine learning; digital rock physics
(This special issue belongs to the Section Engineering)
Fractional Calculus Applied in Environmental Biosystems
edited by Diogo Francisco Rossoni and Gustavo de Souza Matias
submission deadline 31 Oct 2025 | Viewed by 536 | Submission Open
Keywords: bioprocess modeling; environmental models; biosystem anomalies; fractional calculus
Fractional Dynamics and Control in Multi-Agent Systems and Networks
edited by Huaiqin Wu and
submission deadline 31 Oct 2025 | 1 articles | Viewed by 446 | Submission Open
Keywords: system model; fractional-order dynamics; MASs and CNs; stability analysis; nonlinear control
(This special issue belongs to the Section Engineering)
Numerical Simulations of Dynamic Behaviors and Control Design in Fractional Engineering Applications submission deadline 31 Oct 2025 | Viewed by 143 | Submission Open
Keywords: fractional calculus; numerical simulations; dynamic behaviors; control design; sensitivity analysis; fractional programming; fractional-order systems; optimization techniques
(This special issue belongs to the Section General Mathematics, Analysis)
Mathematical and Numerical Analysis of Fractional Evolution Equations and Applications submission deadline 1 Nov 2025 | 1 articles | Viewed by 515 | Submission Open
Keywords: fractional PDEs; numerical solutions; exact solutions; fractional Sobolev spaces; distributed parameter systems; solitary and travelling waves
(This special issue belongs to the Section Numerical and Computational Methods)
Analysis and Modeling of Fractional-Order Dynamical Networks
edited by Wang Fei and
submission deadline 14 Nov 2025 | 6 articles | Viewed by 5946 | Submission Open
Keywords: fractional-order systems; neural networks; gene regulatory networks; dynamical networks; multi-agent systems; coupled systems; synchronization control; heterogeneous networks; analysis of dynamic behavior
(This special issue belongs to the Section Complexity)
Recent Advances in the Spatial and Temporal Discretizations of Fractional PDEs, Second Edition
edited by , Hongbin Chen and
submission deadline 14 Nov 2025 | 3 articles | Viewed by 1659 | Submission Open
Keywords: fractional PDEs; finite difference; finite element; finite volume; spectral methods; nonuniform and adaptive discretizations; adaptive space– time methods; parallel-in-time methods; numerical methods; numerical treatments of integro-differential equations; nonlocal modeling and computation; convolution quadratures; modeling and simulations
(This special issue belongs to the Section Numerical and Computational Methods)
Women’s Special Issue Series: Fractal and Fractional, 2nd Edition
edited by and
submission deadline 15 Nov 2025 | 4 articles | Viewed by 6222 | Submission Open
Keywords: fractals and fractional calculus; fractals and fractional calculus in computing; fractals and fractional calculus in mathematical physics; fractals and fractional calculus in biology and neurocomputing; fractals and fractional calculus in engineering; fractals and fractional calculus in economics; fratals and fractional calculus in educational technologies; fractional calculus and control; fractional calculus and optimization; fractional calculus and stability; fractional models and uncertainty; related fractional modeling
(This special issue belongs to the Section Complexity)
AI-Driven Fractal Models for Complex Systems submission deadline 22 Nov 2025 | Viewed by 184 | Submission Open
Keywords: fractal model and AI for social network and human behaviour; fractal AI models in economic and finance; AI-based fractal models for LLMS and NLP systems; intersection of fractal models and machine learning
(This special issue belongs to the Section Optimization, Big Data, and AI/ML)
Recent Advances in Fractional Fourier Transforms and Applications, 2nd Edition submission deadline 25 Nov 2025 | 4 articles | Viewed by 4822 | Submission Open
Keywords: fractional Fourier transform; linear canonical transform; digital signal processing; fractional integral operator; partial differential equations
(This special issue belongs to the Section General Mathematics, Analysis)
Fractal Analysis and Fractal Dimension in Materials Chemistry, 2nd Edition submission deadline 25 Nov 2025 | 1 articles | Viewed by 1353 | Submission Open
Keywords: fractal dimension; fractal adsorption isotherms; catalysis; diffusion-limited reactions; fractions
Fractional Processes and Systems in Computer Science and Engineering
edited by and
submission deadline 30 Nov 2025 | 5 articles | Viewed by 7229 | Submission Open
Keywords: fractional processes; fractional systems; fractal dimensions; fractal time series; long-range dependence; fractal paths; anomalous diffusion behavior; stochastic processes; fractional Brownian motion; fractional derivative; fractional Gaussian noise; fractional models
(This special issue belongs to the Section Engineering)
Fractals in Biophysics and Their Applications
edited by Anirban Bandyopadhyay
submission deadline 30 Nov 2025 | 5 articles | Viewed by 7133 | Submission Open
Keywords: quantum mechanics; quantum biology; biophysics; biophotonics; bioelectronics; neuroscience; brain dynamics; fractal analysis in medicine; water network in biology
(This special issue belongs to the Section Life Science, Biophysics)
Fractional-Order Dynamics and Control in Green Energy Systems
edited by Manashita Borah and
submission deadline 30 Nov 2025 | 5 articles | Viewed by 6548 | Submission Open
Keywords: fractional-order chaos; energy storage systems; dynamics; control systems; energy storage systems; biological systems; renewable energy applications; energy-efficient robots; green transportation
(This special issue belongs to the Section Engineering)
Advances in Boundary Value Problems for Fractional Differential Equations, 3rd Edition
edited by
submission deadline 30 Nov 2025 | 10 articles | Viewed by 5342 | Submission Open
Keywords: fractional differential equations; fractional differential inclusions; fractional differential inequalities; initial value problems; boundary value problems; existence and nonexistence; uniqueness and multiplicity; stability; numerical computations
(This special issue belongs to the Section General Mathematics, Analysis)
Recent Research in Fractional-Order Controllers and Their Applications submission deadline 30 Nov 2025 | Viewed by 892 | Submission Open
Keywords: fractional-order control; FOPID; fractional calculus; modelling; implementation; stability analysis; control design
Recent Trends in Fractional Integral and Derivative Operators
edited by Arman Dabiri
submission deadline 10 Dec 2025 | Viewed by 73 | Submission Open
Keywords: time-delay systems; control theory for continuum systems; fractional-order systems; fractals and chaos; Volterra integro-differential systems; stochastic systems; diffusion and random walk processes; non-Markov processes; computational methods for nonlocal operators
(This special issue belongs to the Section General Mathematics, Analysis)
Design, Optimization and Applications for Fractional Chaotic System submission deadline 15 Dec 2025 | 6 articles | Viewed by 10675 | Submission Open
Keywords: applications of chaotic systems and circuits; chaos; fractional-order circuits; fractional-order systems; fractional-order models; fractional-order mem-elements; hyperchaos; optimization; synchronization
(This special issue belongs to the Section Engineering)
Fractional Control Systems and Estimation: Control, State Observers and Parameter Estimation
edited by and Gustavo Ceballos-Benavides
submission deadline 15 Dec 2025 | 2 articles | Viewed by 1703 | Submission Open
Keywords: adaptive identification and control; robust control; PID control; parameter estimation; state observers; Liouville– Caputo; Riemann– Liouville; Grunwald– Letnikov; adaptive systems and artificial intelligence
(This special issue belongs to the Section Engineering)
Advances in Fractional Order Systems and Robust Control, 2nd Edition
edited by
submission deadline 20 Dec 2025 | 4 articles | Viewed by 6748 | Submission Open
Keywords: fractional order systems; fractional differential equations; robust control; fractional controllers; stability analysis; modeling
(This special issue belongs to the Section Engineering)
From Fractals to Fractional Calculus: Nonlinear Dynamics and Hybrid Complex Systems
edited by Katica (Stevanović) Hedrih
submission deadline 25 Dec 2025 | Viewed by 100 | Submission Open
Keywords: fractals; nonlinear dynamics; fractional calculus; mathematical phenomenology; hybrid systems; complex structures; discrete and continuous dynamic systems
(This special issue belongs to the Section General Mathematics, Analysis)
Numerical Solution and Applications of Fractional Differential Equations, 3rd Edition
edited by , and
submission deadline 25 Dec 2025 | Viewed by 86 | Submission Open
Keywords: numerical methods; mathematical modelling; fractional calculus; fractional differential equations; numerical analysis; fast algorithm
(This special issue belongs to the Section Numerical and Computational Methods)
Fractional Systems, Integrals and Derivatives: Theory and Application submission deadline 31 Dec 2025 | 13 articles | Viewed by 15479 | Submission Open
Keywords: fractional derivatives of constant order; distributed order fractional derivative; variable order fractional derivative; fractional differential equations/systems; functional-differential equations/systems; stability analysis of fractional-order systems
(This special issue belongs to the Section General Mathematics, Analysis)
Fractional Calculus and Nonlinear Analysis: Theory and Applications submission deadline 31 Dec 2025 | 6 articles | Viewed by 10450 | Submission Open
Keywords: fractional differential equation; fractional complicated system; fractional operator; modeling biological phenomena; nonlinear dynamics and chaos; fixed point theory; optimization; critical point theory; optimization; convex analysis
(This special issue belongs to the Section General Mathematics, Analysis)
Mathematical Inequalities in Fractional Calculus and Applications, 2nd Edition
edited by and
submission deadline 31 Dec 2025 | 7 articles | Viewed by 5454 | Submission Open
Keywords: fractional calculus; caputo derivative; riemann-liouville derivative; discrete fractional calculus; fractals; fractional differential equations; mathematical inequalities; time scales
(This special issue belongs to the Section General Mathematics, Analysis)
Analysis of Heat Conduction and Anomalous Diffusion in Fractional Calculus submission deadline 31 Dec 2025 | 6 articles | Viewed by 4085 | Submission Open
Keywords: fractional calculus and fractal media; thermo-molecular physics; thermodynamics; heat and mass transfer; bio-heat transfer; fractional thermal conduction; anomalous thermal diffusion; nonequilibrium processes; nonequilibrium thermodynamics; kinetics theory
(This special issue belongs to the Section Mathematical Physics)
Recent Advances in Fractional-Order Neural Networks: Theory and Application, 2nd Edition
edited by and Lulu Lu
submission deadline 31 Dec 2025 | 3 articles | Viewed by 2596 | Submission Open
Keywords: fractional calculus; dynamics analysis; biological nervous system; circuit design and simulation; artificial intelligence
(This special issue belongs to the Section General Mathematics, Analysis)
Applications of Fractional Calculus in Modern Mathematical Modeling submission deadline 31 Dec 2025 | 5 articles | Viewed by 2404 | Submission Open
Keywords: fractional calculus; fractional differential equations (FDEs); fractional delay differential equations (FDDEs); stochastic fractional delay differential equations (SFDDEs); memory effects; fractional partial differential equations (FRDE's); stochastic fractional partial differential equations (SFPDEs); existence and uniqueness of solutions for FDEs; stability analysis of FDEs; sufficient conditions for solvability of FDEs with multi-point type data; uniqueness of solution for FDEs with impulses given by functions with several variables; solvability of functional FDES in involving P-Laplacian; multiplicity results for singular FDES in biological models; numerical methods in fractional calculus; biological systems modeling through fractional calculus; efficient computational methods to solve fractional differential equations for biological systems; control theory; mathematical modeling in finance through fractional calculus; data-driven approaches through fractional calculus; machine learning with fractional operators; future research directions and open problems in the application of fractional calculus in mathematical modeling
(This special issue belongs to the Section Numerical and Computational Methods)
Fractional Elliptic and Parabolic Equations: Analysis and Related Topics
edited by Wenxiong Chen and Leyun Wu
submission deadline 31 Dec 2025 | 2 articles | Viewed by 2330 | Submission Open
Keywords: fractional elliptic equations; fractional parabolic equations; fractional laplacian; non-local operators; variational method; multiplicity numerical analysis; applications of fractional equations; nonlinearity; symmetry; monotonicity; a priori estimate; existence; non-existence; uniqueness; classification; method of moving planes; sliding method; etc.
(This special issue belongs to the Section General Mathematics, Analysis)
New Trends on Generalized Fractional Calculus, 2nd Edition submission deadline 31 Dec 2025 | 2 articles | Viewed by 2272 | Submission Open
Keywords: generalised fractional calculus; fractional calculus with general analytic kernels; ψ -fractional derivatives; weighted fractional derivatives; integral transforms; special functions; fractional inequalities; fractional ODE and PDE; initial and Boundary value problems
(This special issue belongs to the Section Numerical and Computational Methods)
Modeling and Dynamic Analysis of Fractional-Order Systems
edited by Li Ma and Fanhai Zeng
submission deadline 31 Dec 2025 | 2 articles | Viewed by 665 | Submission Open
Keywords: stability and control of fractional-order systems; reductions for fractional-order systems; bifurcation and chaos in fractional-order systems; discrete-time or continuous-time fractional-order systems; modeling via fractional calculus; generalized fractional calculus; numerical methods for fractional-order systems
(This special issue belongs to the Section General Mathematics, Analysis)
Recent Trends in Computational Physics with Fractional Applications
edited by , , and Udoh Akpan
submission deadline 31 Dec 2025 | 1 articles | Viewed by 654 | Submission Open
Keywords: stability analysis; integral equations; semi-analytical method; traveling wave solutions; analytical and numerical methods; soliton theory and its applications; fractional calculus and its applications; ordinary and partial differential equations; symmetry analysis and conservation laws; mathematical modeling of flow in porous media; multi-scale approaches to modeling wave phenomena; high-order numerical differential formulas for fractional derivatives; numerical and computational methods in fractional differential equations
(This special issue belongs to the Section Mathematical Physics)
Applications of Fractional-Order Calculus in Robotics, 2nd Edition submission deadline 31 Dec 2025 | Viewed by 390 | Submission Open
Keywords: fractional calculus; fractional control; fractional modeling; robotics; fractal manipulators
Applications of Fractal Dimensions in Rock Mechanics and Geomechanics
edited by and Kangsheng Xue
submission deadline 31 Dec 2025 | Viewed by 232 | Submission Open
Keywords: fractal dimension; rock mechanics; multiscale phenomena; fracture networks; nonlinear deformation; geomechanical applications
(This special issue belongs to the Section Engineering)
Modelling and Analysis of Fractional Behaviours: Alternative Approaches and Characterization
edited by
submission deadline 31 Dec 2025 | Viewed by 162 | Submission Open
Keywords: fractional behaviours; modelling; non-singular kernels; fractal
(This special issue belongs to the Section Engineering)
Nonlinear Fractional Differential Equation and Fixed-Point Theory, 2nd Edition
edited by and
submission deadline 31 Dec 2025 | Viewed by 149 | Submission Open
Keywords: fixed point theory and its applications; approximation theory and its applications; variational inequality and its applications; fractional differential equations; iterated function system; fractal theory; differential equations; finite difference equations; nonlinear analysis; dynamical system; nonlinear convex analysis
(This special issue belongs to the Section General Mathematics, Analysis)
Recent Advances in Fractional Differential Equations and Their Applications, 3rd Edition
edited by Xiaoli Chen, and Ting Gao
submission deadline 31 Dec 2025 | Viewed by 131 | Submission Open
Keywords: nonlocal differential equations; fractional differential equations; stochastic differential equations; numerical method; machine learning methods
(This special issue belongs to the Section Numerical and Computational Methods)
Advances in Fractional-Order Circuit Models: Theory and Applications
edited by
submission deadline 31 Dec 2025 | Viewed by 110 | Submission Open
Keywords: fractional-order circuits; fractional-order models; fractional-order chaotic systems; fractional-order calculus; fractional-order oscillator
(This special issue belongs to the Section Complexity)
Fractal and Fractional in Geomaterials, 2nd Edition
edited by Yifei Sun
submission deadline 15 Jan 2026 | 2 articles | Viewed by 3122 | Submission Open
Keywords: fractal media; fractional mechanics; micro-to-macro. geomaterials; nonconventional approach
(This special issue belongs to the Section Engineering)
Fractional Dynamics in Epidemic Models: Theoretical Approaches and Applications
edited by and
submission deadline 15 Jan 2026 | 1 articles | Viewed by 972 | Submission Open
Keywords: fractional calculus; fractional stochastic models; fractional dynamics; fractional-order epidemic models; epidemiological modeling; fractional models
(This special issue belongs to the Section Life Science, Biophysics)
Applications of Fractional-Order Grey Models, 2nd Edition
edited by and Shuli Yan
submission deadline 15 Jan 2026 | 2 articles | Viewed by 943 | Submission Open
Keywords: fractional-order; grey model; prediction; algorithm; application
(This special issue belongs to the Section Engineering)
Analysis of Geological Pore Structure Based on Fractal Theory
edited by Wei Yang and
submission deadline 20 Jan 2026 | 1 articles | Viewed by 336 | Submission Open
Keywords: fractal theory; fractal analysis; multifractal theory; multifractal analysis; pore structure; pore– crack observation; pore connectivity
(This special issue belongs to the Section Engineering)
Fractional Order Systems with Application to Electrical Power Engineering, 3rd Edition submission deadline 20 Jan 2026 | Viewed by 90 | Submission Open
Keywords: fractional order system; distributed energy resources; energy storage system; multi-energy systems; power electronic systems; power converters; renewable energy systems; artificial intelligence; stability analysis; intelligent control; fractional calculus; reliability and resiliency
(This special issue belongs to the Section Engineering)
Fractal Analysis in Biology and Medicine
edited by
submission deadline 30 Jan 2026 | 2 articles | Viewed by 2687 | Submission Open
Keywords: fractal analysis; fractal dimension; complexity; self-similarity; neuroscience; morphometry; cell and tissue analysis
(This special issue belongs to the Section Life Science, Biophysics)
Advances in Fractional-Order Chaotic and Complex Systems
edited by , and
submission deadline 31 Jan 2026 | 5 articles | Viewed by 5493 | Submission Open
Keywords: fractional-order theory; fractional-order systems; complex systems; chaos; chaotic systems; chaos applications; non-linear systems; neural networks
(This special issue belongs to the Section Complexity)
Fractional-Order Systems: Modeling and Control Applications in Engineering
edited by and
submission deadline 31 Jan 2026 | 1 articles | Viewed by 527 | Submission Open
Keywords: fractional-order differential or difference equations; fractional controlling theories; fractional-order systems; numerical methods; optimization techniques; complex networks; neural networks; applications in robotics and automation; applications in power and electrical systems; applications in mechanical systems; applications in biomedical engineering; applications in signal processing and communications
(This special issue belongs to the Section General Mathematics, Analysis)
Advances in Fractional Integral Inequalities: Theory and Applications submission deadline 31 Jan 2026 | Viewed by 399 | Submission Open
Keywords: fractional integral inequalities; numerical integrations methods; operator theory; convex and concave functions
(This special issue belongs to the Section General Mathematics, Analysis)
Nonlinear Dynamics, Chaos and Control of Fractional Systems
edited by Vinícius Piccirillo, , and Jeferson José de Lima
submission deadline 31 Jan 2026 | Viewed by 75 | Submission Open
Keywords: fractional-order systems; nonlinear dynamics; chaos and bifurcation; fractional-order control; memory effects; time series modeling
(This special issue belongs to the Section Engineering)
Modeling, Simulation and Applications of Fractal/Fractional Calculus to Engineering Materials submission deadline 31 Jan 2026 | Viewed by 67 | Submission Open
Keywords: constitutive models; fractional/fractal viscoelasticity; fractional/fractal viscoplasticity; numerical methods; multiscale modeling; dynamic analyses; artificial intelligence (AI)
(This special issue belongs to the Section Engineering)
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