Advances in Nonlinear Functional Analysis on Fractional Differential Equations, 2nd Edition

A special issue of Fractal and Fractional (ISSN 2504-3110). This special issue belongs to the section "General Mathematics, Analysis".

Deadline for manuscript submissions: 31 October 2025 | Viewed by 1448

Special Issue Editor


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Guest Editor
Department of Mathematics, Gauhati University, Guwahati 781014, Assam, India
Interests: sequence spaces; application of fixed point theory; measure of non-compactness; fractional calculus, nonlinear analysis
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Special Issue Information

Dear Colleagues,

Nonlinear functional analysis is one of the techniques of nonlinear mapping between infinite dimensional vector space and a certain class of nonlinear spaces. The subject of nonlinear functional analysis is of interest in its own right, and it also serves to lay the foundations for different fields of pure and applied mathematics. Researchers worldwide are actively involved in analysing and developing different theories of nonlinear functional analysis and fractional differential equations applicable to real-world problems.

The fractional differential equations describe different nonlocal dynamic systems in scientific and engineering fields such as biology, physics, chemistry, control theory, economics, signal processing, etc. Fractional derivatives play a significant role in formulating models of nonlinear systems in real-life phenomena. Fractional models are useful for reporting different chaotic behavior. There exist many theoretical results for checking the existence and uniqueness of fractional differential equations, but there is still signficant scope to discuss the nonlinear fractional differential equations.

In this Special Issue, we will share the recent progress and advances in the different fields of nonlinear functional analysis and fractional differential equations to identify fruitful research directions and inspire collaborations.

This Special Issue focuses on recent developments and achievements in nonlinear functional analysis and fractional differential equations and identifies their applications. We invite authors to submit original research and review articles describing new methods and applications directly or indirectly related to nonlinear functional analysis, fractional differential equations, Banach spaces, function spaces, and sequence spaces. We also welcome research including fixed-point theory, nonlinear operator theory, and nonlinear fractional dynamic equations.

Potential topics include:

  • Nonlinear functional analysis and applications;
  • Control theory and applications;
  • Nonlinear fractional dynamic equations on timescale; 
  • Fixed point theory and applications;
  • Modeling in ecological systems;
  • Nonlinear dynamical systems and fractional calculus;
  • Solvability of infinite systems of nonlinear fractional differential, integral, and integro-differential equations on sequence spaces and function spaces;
  • Nonlinear functionals and variational methods for nonlinear operators.

Please feel free to read and download all published papers in our 1st volume:

https://www.mdpi.com/journal/fractalfract/special_issues/ANFAFDE.

Prof. Dr. Bipan Hazarika
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fractal and Fractional is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nonlinear functional analysis
  • control theory and applications
  • nonlinear fractional dynamic equations on timescale
  • fixed point theory
  • ecological systems
  • nonlinear dynamical systems
  • fractional calculus
  • solvability of infinite systems
  • sequence spaces and function spaces
  • nonlinear functionals and variational methods
  • nonlinear operators

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Related Special Issue

Published Papers (2 papers)

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Research

18 pages, 1992 KiB  
Article
AI-Based Data Analysis of Contaminant Transportation with Regression of Oxygen and Nutrients Measurement
by Hasib Khan, Jehad Alzabut, Mohamed Tounsi and Dalal Khalid Almutairi
Fractal Fract. 2025, 9(2), 125; https://doi.org/10.3390/fractalfract9020125 - 17 Feb 2025
Viewed by 327
Abstract
This research is based on the artificial intelligence approach for the error and regression analysis of contaminants, nutrients, and oxygen level in water bodies using a Caputo’s difference model. The model is composed of four subgroups including contaminant concentration (which is denoted by [...] Read more.
This research is based on the artificial intelligence approach for the error and regression analysis of contaminants, nutrients, and oxygen level in water bodies using a Caputo’s difference model. The model is composed of four subgroups including contaminant concentration (which is denoted by C), the temperature of the fluid T, oxygen concentration O, and nutrients N. ξC,ξT,ξO,ξN are assumed as diffusion constants for the respective classes. The fractional-order difference model is investigated for the existence and uniqueness of solutions as well as Hyers–Ulam stability, subjected to certain assumptions. The computational results demonstrate that the maximum contaminant concentrations reach 0.01046 mg/L for ξC=0.1 and WR = 0.1, resulting in nutrient levels as low as 4.9969 mg/L. The model predicts that increased pollutant loads increase local temperatures to 20.009 C. Furthermore, an inverse correlation between reaction rates and contaminant concentrations is also observed, whereby an increase in WR from 0.1 to 0.2 reduces concentrations to 0.0038327 mg/L. Full article
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12 pages, 289 KiB  
Article
Forced-Perturbed Fractional Differential Equations of Higher Order: Asymptotic Properties of Non-Oscillatory Solutions
by Said R. Grace, Gokula N. Chhatria, S. Kaleeswari, Yousef Alnafisah and Osama Moaaz
Fractal Fract. 2025, 9(1), 6; https://doi.org/10.3390/fractalfract9010006 - 27 Dec 2024
Cited by 1 | Viewed by 722
Abstract
This study investigates the asymptotic behavior of non-oscillatory solutions to forced-perturbed fractional differential equations with the Caputo fractional derivative. The main aim is to unify the Beta Integral Lemma (Lemma 2) and the Gamma Integral Lemma (Lemma 3) into a single framework. By [...] Read more.
This study investigates the asymptotic behavior of non-oscillatory solutions to forced-perturbed fractional differential equations with the Caputo fractional derivative. The main aim is to unify the Beta Integral Lemma (Lemma 2) and the Gamma Integral Lemma (Lemma 3) into a single framework. By combining these two powerful tools, we propose new criteria that effectively characterize the asymptotic behavior of non-oscillatory solutions to the given equations. The analysis of such solutions has significant implications in the fields of oscillation and stability theory. Notably, our findings extend prior work by exploring a wider range of equations with more general functions and coefficients, thereby broadening the applicability and deepening the understanding of both asymptotic and oscillatory behaviors. Moreover, the criteria we introduce offer improvements over previous approaches, as demonstrated by the example provided, which highlights the advantages of our results in comparison to earlier methods. Full article
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