**31 Jul 2020**| 10 articles

(This special issues belongs to the Section Algebraic Geometry)

*Mathematics* runs special issues to create collections of papers on specific topics. The aim is to build 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 in the subject and oversee the editorial process for papers. Papers published in a Special Issue
will be collected together on a dedicated page of the journal website. For any inquiries related to a Special Issue, please
contact the Editorial Office.

Discrete and Computational Geometry
submission deadline **31 Jul 2020**
| 10 articles

(This special issues belongs to the Section Algebraic Geometry)

Variational Inequality
submission deadline **31 Jul 2020**
| 12 articles
*Keywords:* Variational inequality; Complementarity problem; Variational analysis; Optimization; Optimal control

(This special issues belongs to the Section Computational Mathematics)

Probability, Statistics and Their Applications
submission deadline **31 Jul 2020**
| 13 articles
*Keywords:* Applied and theoretical statistics; New probability distributions and estimation methods; Broken stick models; Lorenz curve; Scan statistics; Discretization of random variables; Clustering of random variables

(This special issues belongs to the Section Probability and Statistics Theory)

Inequalities in Geometry and Applications
submission deadline **31 Jul 2020**
| 11 articles
*Keywords:* geometric inequality; diameter; length; area; volume; convex body; isoperimetric defect; mixed volume; manifold; submanifold; space form; sectional curvature; Gauss curvature; Ricci curvature; Chen invariant; volume form; Laplace–Beltrami operator; Dirichlet eigenvalue; algebraic curve; Euler characteristic; Riemannian surface

(This special issues belongs to the Section Algebraic Geometry)

Algebra and Its Applications
submission deadline **31 Jul 2020**
| 7 articles
*Keywords:* Algebra; Applied algebra; Groups; Rings; Fields; Graph theory; Coding theory; Cryptography; Algebraic machine learning; Algebraic bioinformatics

(This special issues belongs to the Section Algebraic Geometry)

Group Decision Making Based on Artificial Intelligence
submission deadline **31 Jul 2020**
| 5 articles
*Keywords:* Group decision making; Fuzzy group decision making; Soft consensus; Intelligent decision making based on computational intelligence; Aggregation operators; Social group decision making; Large-scale group decision making; Dynamic decision making; Intelligent decision making and applications.

(This special issues belongs to the Section Fuzzy Set Theory)

Direct and Inverse Problems for Fractional Differential Equations
submission deadline **31 Jul 2020**
| 7 articles
*Keywords:* Fractional derivative; Distributed derivative; Fractional differential equation; Initial value problem; Boundary value problem; Inverse problem; Identification problem; Existence and uniqueness of solution; Group analysis

(This special issues belongs to the Section Difference and Differential Equations)

Computing Methods in Steganography and Multimedia Security
submission deadline **31 Jul 2020**
| 12 articles

(This special issues belongs to the Section Computational Mathematics)

Algebra and Number Theory
submission deadline **31 Jul 2020**
| 1 articles
*Keywords:* Computational complexity; Cryptography; Diophantine equations; Elliptic curves; Lattices; Linear codes; Pseudorandom sequences.

(This special issues belongs to the Section Algebraic Geometry)

Analytical Approaches to Nonlinear Dynamical Systems and Applications
submission deadline **31 Jul 2020**
| 5 articles
*Keywords:* Dynamical systems; Nonlinear phenomena; Analytical methods; Nonlinear differential equations; Approximate analytical solutions

(This special issues belongs to the Section Dynamical Systems)

Mathematical Biology:Modeling, Analysis, and Simulations
submission deadline **20 Aug 2020**
| 7 articles
*Keywords:* Bio-inspired modeling; Population dynamics; Cellular and molecular dynamics; Computational neuroscience; Heart disease modeling

(This special issues belongs to the Section Mathematics and Computer Science)

Recent Advances and Applications in Multi-Criteria Decision Analysis
submission deadline **31 Aug 2020**
| 3 articles
*Keywords:* discrete and continuous MCDA; preference quantification; uncertainty in decision-making; group decision-making

(This special issues belongs to the Section Mathematics and Computer Science)

Mathematical Modeling of Socio-Economic Systems
submission deadline **31 Aug 2020**
| 6 articles

(This special issues belongs to the Section Financial Mathematics)

Advances in Mathematical Methods for Machine Learning Algorithms for Computer Aided Diagnostic Systems
submission deadline **31 Aug 2020**
| 3 articles

(This special issues belongs to the Section Mathematics and Computer Science)

Dynamics under Uncertainty: Modeling Simulation and Complexity
submission deadline **31 Aug 2020**
| 6 articles

(This special issues belongs to the Section Dynamical Systems)

Matrix Structures: Numerical Methods and Applications
submission deadline **31 Aug 2020**
| 5 articles
*Keywords:* Structured matrices; Matrix algebras; Low-rank approximations; Matrix equations; Spectral analysis; Preconditioning; Iterative methods; Regularization of ill-posed problems

(This special issues belongs to the Section Mathematics and Computer Science)

Mathematical Modeling in Industrial Engineering and Electrical Engineering
submission deadline **31 Aug 2020**
| 8 articles
*Keywords:* Artificial Intelligence; Complex systems; Delayed systems; Dynamical systems; Machine learning; Mathematical modeling; Neural networks; Numerical techniques; Physics-based modeling; Soft computing techniques; Stability; Uncertain systems; Application in industrial and electrical engineering

(This special issues belongs to the Section Engineering Mathematics)

Mathematical Modelling in Applied Sciences
submission deadline **31 Aug 2020**
*Keywords:* mathematical description; objective description; nonobjective description in mechanics; integer order differential equations; fractional order differential equations.

(This special issues belongs to the Section Engineering Mathematics)

Selected Papers from the 2nd International Conference on Mathematical Modeling and Computational Methods in Science and Engineering (ICMMCMSE-2020)
submission deadline **31 Aug 2020**
| 5 articles
*Keywords:* Applied Algebra; Advanced Analysis; Applied Mathematics and Modeling; Big Data Analytics; Coding Theory; Dynamical Systems; Fuzzy Sets and Logic; Numerical Analysis; Operations Research; Optimization Techniques; Scientific Computing; Stochastic Processes; Soft Computing; System Engineering

(This special issues belongs to the Section Mathematics and Computer Science)

The Cryptography of Cryptocurrency
submission deadline **31 Aug 2020**
| 1 articles

(This special issues belongs to the Section Algebraic Geometry)

Supply Chain Optimization
submission deadline **31 Aug 2020**
| 5 articles
*Keywords:* Supply chain optimization; Logistics optimization; Supplier evaluation and selection; Supplier vertical integration; Green supply chain; Optimal plant location; Routes optimization; Procurement and distribution; Resources, methodologies, and technology in the supply chain; Decision making in the supply chain

(This special issues belongs to the Section Financial Mathematics)

Models of Delay Differential Equations
submission deadline **31 Aug 2020**
| 6 articles
*Keywords:* Delay differential equations; Partial delay differential equations; Random and stochastic delay differential equations; Numerical methods; Exact solutions and dynamical properties; Diffusion and heat conduction models with delay; Uncertainty quantification with delay differential equations and simulation; Models with delay in biology, economics, and engineering

(This special issues belongs to the Section Difference and Differential Equations)

Mathematical Analysis in Economics and Management
submission deadline **31 Aug 2020**
| 12 articles
*Keywords:* Financial technology; Mobile payment; Equity crowdfunding; Entrepreneur; Big data; Machine learning; Statistical model; Decision science analysis

(This special issues belongs to the Section Financial Mathematics)

Advanced Methods in Mathematical Finance
submission deadline **31 Aug 2020**
| 10 articles
*Keywords:* Classical financial mathematics; Fuzzy models of financial mathematics; Behavioural models of financial mathematics; Evaluation of assets; Discounting; Portfolio analysis; Financial risk

(This special issues belongs to the Section Financial Mathematics)

Queue and Stochastic Models for Operations Research
submission deadline **15 Sep 2020**
| 5 articles
*Keywords:* Stochastic models; Matrix analytic methods; Asymptotic analysis of queueing models; Game theoretic analysis of queues; Fluid and diffusion limits, large deviation analysis of queues; Stochastic analysis of risk models; Matching queues; Multidimensional Markov chains; Novel queueing models in applications; Stochastic analysis of machine learning systems

(This special issues belongs to the Section Mathematics and Computer Science)

Mathematical Models in Epidemiology
submission deadline **30 Sep 2020**
| 5 articles
*Keywords:* Epidemic models; Basic reproduction number; Ordinary differential equations; Delay differential equations; Partial differential equations; Dynamical systems; Stability analysis; Bifurcation; Optimal control; Network

(This special issues belongs to the Section Engineering Mathematics)

Applications of Decision-Making Systems and Embedded Computing
submission deadline **30 Sep 2020**
*Keywords:* Decision-making systems; Data mining; Machine learning; Embedded computing; Swarm-based optimization

(This special issues belongs to the Section Engineering Mathematics)

Fractional Integrals and Derivatives: “True” versus “False”
submission deadline **30 Sep 2020**
| 9 articles
*Keywords:* fractional integrals and derivatives; fractional differential equations; mathematical properties of fractional operators; applications of fractional integrals and derivatives; physical justification of fractional operators; modeling with fractional operators

(This special issues belongs to the Section Computational Mathematics)

Advances in Statistical Process Control and Their Applications
submission deadline **30 Sep 2020**
| 5 articles
*Keywords:* Statistical process control (SPC); Rapid data collection; Multivariate SPC; Data signatures

(This special issues belongs to the Section Engineering Mathematics)

Recent Trends on Orthogonal Polynomials: Approximation Theory and Applications
submission deadline **30 Sep 2020**
| 7 articles
*Keywords:* Orthogonal polynomials on the real line; Orthogonal polynomials on the unit circle; Matrix orthogonal polynomials; Multiple orthogonal polynomials; Multivariate orthogonal polynomials; Sobolev orthogonal polynomials; Integrable systems; Random matrices; Quadrature and cubature formulas; Rational approximation; Approximation with splines; Wavelets

Modern Geometric Modeling: Theory and Applications
submission deadline **30 Sep 2020**
| 7 articles
*Keywords:* Curve, surface, and solid modeling; Mathematical design; Applied geometry; Computational geometry and topology; Isogeometric analysis; High-quality curves and surfaces; Non-polynomial curves and surfaces (log-aesthetic curves, superspirals, quaternion curves, etc.); Mesh generation; Industrial and scientific applications

(This special issues belongs to the Section Mathematics and Computer Science)

New Advances in Fuzzy Metric Spaces, Soft Metric Spaces, and Other Related Structures
submission deadline **30 Sep 2020**
| 10 articles
*Keywords:* Fuzzy (quasi-)metric spaces; Fuzzy (quasi-)uniformities; Fuzzy normed spaces; Soft metric spaces; Fixed-point theory; Fuzzy set theory; Soft set theory; Applications

(This special issues belongs to the Section Fuzzy Set Theory)

Quantitative Methods for Economics and Finance
submission deadline **30 Sep 2020**
| 8 articles
*Keywords:* Financial series; Portfolio theory; Factor models; Volatility modeling; Quantitative methods; Long memory; Computational finance; Statistical arbitrage

(This special issues belongs to the Section Financial Mathematics)

Intelligent Optimization in Big Data, Machine Learning and Artificial Intelligence
submission deadline **30 Sep 2020**
| 6 articles
*Keywords:* Classical intelligent optimization algorithms; Population-based intelligent algorithms; Hybrid optimization; Multi-objective optimization; Big data; Machine learning; Artificial intelligence; Operation research

(This special issues belongs to the Section Computational Mathematics)

Numerical Modeling and Analysis
submission deadline **30 Sep 2020**
| 6 articles
*Keywords:* Numerical method; Ordinary differential equation; Partial differential equation; Integral equation; Optimization; Inverse problem; Mathematical modeling; Fractional calculus

(This special issues belongs to the Section Computational Mathematics)

Advanced Modeling and Research in Hybrid Microgrid Control and Optimization
submission deadline **30 Sep 2020**
| 5 articles
*Keywords:* Hybrid nano- and micro-grids; Hybrid power systems (HPSs); Renewable energy sources (RESs); Fuel cell (FC) systems; FC RES hybrid microgrids; Energy management strategies (EMSs); Blockchain technology; Smart contracts; Hybrid energy storage systems (HESSs); Fuel cell vehicles (FCVs); Vehicle-to-building (V2B); Vehicle-to-grid (V2G); Global optimization (GO); System modeling and design; Cybersecurity, reliability, maintenance, resilience, and safety in operation

(This special issues belongs to the Section Engineering Mathematics)

Stochastic Modeling in Biology
submission deadline **30 Sep 2020**
| 5 articles
*Keywords:* Neuronal models; Jump-diffusion processes; Markov and semi-Markov processes; Time-changed processes; Markov chains; Fractional processes; Fractional Brownian motion

(This special issues belongs to the Section Computational Mathematics)

Mathematical Models in Security, Defense, Cyber Security and Cyber Defense
submission deadline **30 Sep 2020**
| 5 articles
*Keywords:* Mathematical modeling; Complex networks; Security and cyber security; Defense and cyber defense; Cryptography

(This special issues belongs to the Section Mathematics and Computer Science)

Stability Problems for Stochastic Models: Theory and Applications
submission deadline **30 Sep 2020**
| 11 articles

(This special issues belongs to the Section Mathematics and Computer Science)

Neural Networks and Learning Systems
submission deadline **30 Sep 2020**
| 4 articles
*Keywords:* neural networks; neurons; stability; circuit theory; nonlinear systems; synchronization; network topology; couplings; convergence

(This special issues belongs to the Section Network Science)

Applications of Fuzzy Optimization and Fuzzy Decision Making
submission deadline **30 Sep 2020**
| 6 articles

(This special issues belongs to the Section Fuzzy Set Theory)

On Interdisciplinary Modelling and Numerical Simulation in the Realm of Physics & Engineering
submission deadline **20 Oct 2020**
| 4 articles

(This special issues belongs to the Section Dynamical Systems)

Stochastic Processes in Neuronal Modeling
submission deadline **30 Oct 2020**
| 5 articles
*Keywords:* Stochastic differential equations; Neuronal models; Fractional dynamics; Long-range dependence; Population models; Information measures; Statistics; Simulation

(This special issues belongs to the Section Network Science)

Machine Learning and Data Mining in Pattern Recognition
submission deadline **30 Oct 2020**
| 1 articles

(This special issues belongs to the Section Mathematics and Computer Science)

Functional Statistics: Outliers Detection and Quality Control
submission deadline **31 Oct 2020**
| 7 articles

(This special issues belongs to the Section Engineering Mathematics)

Computer Aided Geometric Design
submission deadline **31 Oct 2020**
| 2 articles
*Keywords:* Computer-aided geometric design; Splines and NURBS; Shape preservation; Isogeometric analysis; Subdivision; Interpolation, approximation, and smoothing; Wavelets and multiresolution methods; Computational geometry; Computer graphics; Scattered data processing

(This special issues belongs to the Section Mathematics and Computer Science)

Active Methodologies for the Promotion of Mathematical Learning
submission deadline **31 Oct 2020**
| 2 articles
*Keywords:* mathematical education; active methodologies; educational innovation; flipped classroom; mobile learning; gamification; information and communication technologies; emerging technologies; good practices in mathematics education

(This special issues belongs to the Section Engineering Mathematics)

Recent Investigations of Differential and Fractional Equations and Inclusions
submission deadline **31 Oct 2020**
| 6 articles
*Keywords:* differential equations; differential inclusions; fuzzy differential and integral equations; fractional differential equations; difference equations; dynamical models

(This special issues belongs to the Section Difference and Differential Equations)

Applications of Mathematical Methods and Fuzzy Techniques in Decision Making
submission deadline **31 Oct 2020**
| 15 articles

(This special issues belongs to the Section Fuzzy Set Theory)

Complex and Contact Manifolds
submission deadline **31 Oct 2020**
| 6 articles
*Keywords:* complex manifolds; contact manifolds; Riemannian invariants; complex contact manifolds; submanifolds in complex and contact manifolds; holomorphic and Sasakian statistical manifolds

(This special issues belongs to the Section Engineering Mathematics)