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Special Issue: Functional Equations and Dynamical Systems on Time Scales

Guest Editor

Prof. Dr. Youssef N. Raffoul
Department of Mathematics, University of Dayton, 300 College Park, Dayton OH 45469-2316, USA
Email: yraffoul1@udayton.edu
Interests: Mathematics; Differential/Difference Equations; Integral Equations and Dynamical Systems on Time Scales

Manuscript Topics


Functional equations and dynamical systems on time scales are two interconnected areas of mathematics that provide a framework for studying the behavior of functions and systems over both continuous and discrete time domains. In particular,


Functional equations are equations that involve functions as variables. They often arise in various fields, including mathematics, physics, engineering, and economics, as a means to model relationships between variables that are not directly related by ordinary algebraic equations. Functional equations can be classified into different types, such as linear, nonlinear, differential, integral, and more. They have applications in various areas, including the stability of solutions, optimization problems, and modeling complex systems.


On the other hand, Dynamical systems on time scales provide a unified framework for studying both continuous and discrete time systems. Time scales theory generalizes the concepts of real numbers and integers to a more general mathematical structure that encompasses both continuous and discrete time. Time scales allow mathematicians and researchers to bridge the gap between continuous and discrete dynamics, making it easier to analyze systems that exhibit mixed behaviors.


The study of functional equations and dynamical systems on time scales has several key objectives and applications, including:
•  Analyzing and understanding the behavior of systems that combine continuous and discrete dynamics, which can occur in various real-world situations.
•  Investigating the stability and existence of solutions to various types of functional equations on time scales.
•  Developing methods for solving complex systems of differential or difference equations, which may have applications in physics, engineering, and biology.
•  Studying the periodicity and long-term behavior of systems with both continuous and discrete components.


This special issue complements the aim of the journal since functional equations and dynamical systems occupy huge areas in mathematics and have abundant applications.


The major aim of this special issue is for authors from scientific disciplines to publish high quality research on recent developments in the field of dynamical systems and related applications. Topics for this special issue may include, but are not limited to, the following:


•  Qualitative theory of differential equations including partial differential equations
•  Boundary value problems
•  Integral equations
•  Integro-differential equations


A special issue focused on dynamical systems and related applications in scientific disciplines can cover a wide range of topics. Here are some key areas and topics that you might consider including in such a special issue:
    1. Nonlinear Dynamics and Chaos Theory:
        •  Bifurcation theory
        •  Strange attractors
        •  Fractals in dynamical systems
    2. Applications in Physics:
        •  Celestial mechanics
        •  Fluid dynamics
        •  Quantum mechanics
        •  Classical mechanics
    3. Applications in Engineering:
        •  Control theory
        •  Robotics
        •  Vibrations and structural dynamics
        •  Electrical circuits and systems
    4. Applications in Biology:
        •  Population dynamics
        •  Epidemiology modeling
        •  Neurodynamics
        •  Evolutionary dynamics


Keywords: Functional Equations, Dynamical systems, Integral equations, Integro-differential equations, Time scales


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Paper Submission

All manuscripts will be peer-reviewed before their acceptance for publication. The deadline for manuscript submission is 30 September 2024

Published Papers(16)

Research article
Persistence and stability in an SVIR epidemic model with relapse on timescales
Sabbavarapu Nageswara Rao Mahammad Khuddush Ahmed H. Msmali Ali H. Hakami
2025, Volume 10, Issue 2: 4173-4204. doi: 10.3934/math.2025194
Abstract HTML PDF Viewed (201)
Research article
Unveiling new reverse Hilbert-type dynamic inequalities within the framework of Delta calculus on time scales
Haytham M. Rezk Mohammed Zakarya Amirah Ayidh I Al-Thaqfan Maha Ali Belal A. Glalah
2025, Volume 10, Issue 2: 2254-2276. doi: 10.3934/math.2025104
Abstract HTML PDF Viewed (261)
Research article
Fourth-order differential equations with neutral delay: Investigation of monotonic and oscillatory features
H. Salah M. Anis C. Cesarano S. S. Askar A. M. Alshamrani E. M. Elabbasy
2024, Volume 9, Issue 12: 34224-34247. doi: 10.3934/math.20241630
Abstract HTML PDF Viewed (521)
Research article
Fourth-order neutral dynamic equations oscillate on timescales with different arguments
Abdelkader Moumen Amin Benaissa Cherif Fatima Zohra Ladrani Keltoum Bouhali Mohamed Bouye
2024, Volume 9, Issue 9: 24576-24589. doi: 10.3934/math.20241197
Abstract HTML PDF Viewed (726)
Research article
Oscillatory behavior of solutions of third order semi-canonical dynamic equations on time scale
Ahmed M. Hassan Clemente Cesarano Sameh S. Askar Ahmad M. Alshamrani
2024, Volume 9, Issue 9: 24213-24228. doi: 10.3934/math.20241178
Abstract HTML PDF Viewed (859)
Research article
Novel generalized inequalities involving a general Hardy operator with multiple variables and general kernels on time scales
M. Zakarya Ghada AlNemer A. I. Saied H. M. Rezk
2024, Volume 9, Issue 8: 21414-21432. doi: 10.3934/math.20241040
Abstract HTML PDF Cited (1) Viewed (827)
Research article
Asymptotic behavior of some differential inequalities with mixed delays on time scales and their applications
Bingxian Wang Mei Xu
2024, Volume 9, Issue 6: 16453-16467. doi: 10.3934/math.2024797
Abstract HTML PDF Viewed (867)
Research article
Chaotic behavior and controlling chaos in a fast-slow plankton-fish model
Guilin Tang Ning Li
2024, Volume 9, Issue 6: 14376-14404. doi: 10.3934/math.2024699
Abstract HTML PDF Viewed (1130)
Research article
The study on the complex nature of a predator-prey model with fractional-order derivatives incorporating refuge and nonlinear prey harvesting
Kottakkaran Sooppy Nisar G Ranjith Kumar K Ramesh
2024, Volume 9, Issue 5: 13492-13507. doi: 10.3934/math.2024657
Abstract HTML PDF Cited (1) Viewed (1054)
Research article
Dynamic inequalities of Grüss, Ostrowski and Trapezoid type via diamond-α integrals and Montgomery identity
Marwa M. Tharwat Marwa M. Ahmed Ammara Nosheen Khuram Ali Khan Iram Shahzadi Dumitru Baleanu Ahmed A. El-Deeb
2024, Volume 9, Issue 5: 12778-12799. doi: 10.3934/math.2024624
Abstract HTML PDF Viewed (982)
Research article
Some fixed point and stability results in b-metric-like spaces with an application to integral equations on time scales
Zeynep Kalkan Aynur Şahin Ahmad Aloqaily Nabil Mlaiki
2024, Volume 9, Issue 5: 11335-11351. doi: 10.3934/math.2024556
Abstract HTML PDF Cited (2) Viewed (1480)
Research article
Some new generalizations of reversed Minkowski's inequality for several functions via time scales
Elkhateeb S. Aly A. I. Saied I. Ibedou Mohamed S. Algolam Wael W. Mohammed
2024, Volume 9, Issue 5: 11156-11179. doi: 10.3934/math.2024547
Abstract HTML PDF Viewed (1203)
Research article
Proportional fractional Dirac dynamic system
Tuba Gulsen Emrah Yilmaz Ayse Çiğdem Yar
2024, Volume 9, Issue 4: 9951-9968. doi: 10.3934/math.2024487
Abstract HTML PDF Viewed (966)
Research article
Harvesting a population model with Allee effect in a periodically varying environment
Fahad M. Alharbi
2024, Volume 9, Issue 4: 8834-8847. doi: 10.3934/math.2024430
Abstract HTML PDF Cited (1) Viewed (1148)
Research article
Positive periodic solution for enterprise cluster model with feedback controls and time-varying delays on time scales
Chun Peng Xiaoliang Li Bo Du
2024, Volume 9, Issue 3: 6321-6335. doi: 10.3934/math.2024308
Abstract HTML PDF Viewed (1129)
Research article
Some dynamic Hardy-type inequalities with negative parameters on time scales nabla calculus
Elkhateeb S. Aly Y. A. Madani F. Gassem A. I. Saied H. M. Rezk Wael W. Mohammed
2024, Volume 9, Issue 2: 5147-5170. doi: 10.3934/math.2024250
Abstract HTML PDF Cited (4) Viewed (1193)