Research on Delay Differential Equations and Their Applications

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "C1: Difference and Differential Equations".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 487

Special Issue Editor


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Guest Editor
Department of Mathematics, Zhejiang Sci-Tech University, Hangzhou 310018, China
Interests: high accurate and fast algorithms for nonlinear evolution equations; stability and numerical simulation of delayed differential equations; efficient numerical methods for fractional differential equations

Special Issue Information

Dear Colleagues,

Delay differential equations (DDEs) are a type of differential equation where the derivative of the unknown function at a certain time depends on the values of the function at previous times. This is in contrast to ordinary differential equations (ODEs), where the derivative depends only on the current value of the function. Their applications span a wide range of disciplines, from biology and engineering to economics and physics. Despite the challenges in solving and analyzing DDEs, they provide a more accurate representation of many real-world processes compared to ODEs. This Special Issue aims to gather original contributions including, but not limited to, the following:

  • Analytical/numerical methods for solving DDEs.
  • Constant delay DDEs.
  • Time-dependent delay DDEs.
  • State-dependent delay DDEs.
  • Neutral DDEs.
  • Fractional DDEs.
  • Stochastic DDEs.

Dr. Qifeng Zhang
Guest Editor

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Keywords

  • numerical solution
  • analytical solution
  • modeling
  • stability analysis
  • convergence
  • delay diffusion equations
  • delay wave-type equations
  • partial differential equations with delay
  • partial functional differential equations
  • fractional delay partial differential equations

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Published Papers (1 paper)

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Research

17 pages, 497 KiB  
Article
Analyzing Coupled Delayed Fractional Systems: Theoretical Insights and Numerical Approaches
by Meraa Arab, Mohammed S. Abdo, Najla Alghamdi and Muath Awadalla
Mathematics 2025, 13(7), 1113; https://doi.org/10.3390/math13071113 - 28 Mar 2025
Viewed by 374
Abstract
In this work, we investigate the theoretical properties of a generalized coupled system of finite-delay fractional differential equations involving Caputo derivatives. We establish rigorous criteria to ensure the existence and uniqueness of solutions under appropriate assumptions on the problem parameters and constituent functions, [...] Read more.
In this work, we investigate the theoretical properties of a generalized coupled system of finite-delay fractional differential equations involving Caputo derivatives. We establish rigorous criteria to ensure the existence and uniqueness of solutions under appropriate assumptions on the problem parameters and constituent functions, employing contraction mapping principles and Schauder’s fixed-point theorem. Then, we examine the Ulam–Hyers stability of the proposed system. To illustrate the main findings, three examples are provided. Moreover, we provide numerical solutions using the Adams–Bashforth–Moulton method. The practical significance of our results is demonstrated through illustrative examples, highlighting applications in predator–prey dynamics and control systems. Full article
(This article belongs to the Special Issue Research on Delay Differential Equations and Their Applications)
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