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A Caputo fractional-order mathematical model for the transmission dynamics of tuberculosis (TB) was recently proposed in [Math. Model. Nat. Phenom. 13 (2018), no. 1, Art. 9]. Here, a sensitivity analysis of that model is done, showing the…

Optimization and Control · Mathematics 2019-08-12 Silverio Rosa , Delfim F. M. Torres

We propose a fractional order model for HIV/AIDS transmission. Local and uniform stability of the fractional order model is studied. The theoretical results are illustrated through numerical simulations.

Optimization and Control · Mathematics 2019-06-07 Cristiana J. Silva , Delfim F. M. Torres

Epidemic models play a crucial role in population dynamics, offering valuable insights into disease transmission while aiding in epidemic prediction and control. In this paper, we analyze the mathematical model of the time-fractional Zika…

Dynamical Systems · Mathematics 2026-02-24 Gaurav Saini , Bappa Ghosh , Sunita Chand

We introduce a fractional order SIRS model with non-linear incidence rate. Existence of a unique positive solution to the model is proved. Stability analysis of the disease free equilibrium and positive fixed points are investigated.…

Dynamical Systems · Mathematics 2021-03-23 Moulay Rchid Sidi Ammi , Mostafa Tahiri , Delfim F. M. Torres

This paper investigates the global stability and the global asymptotic stability independent of the sizes of the delays of linear time-varying Caputo fractional dynamic systems of real fractional order possessing internal point delays. The…

Dynamical Systems · Mathematics 2010-10-18 M. De La Sen

In this paper, we discuss on the linearized stability of the trivial solution for a class of nonlinear Caputo fractional differential systems of order $\alpha\in(1,2)$. We show that some recent existing results in this direction are wrong.…

Dynamical Systems · Mathematics 2020-07-30 H. T. Tuan

In this paper, a linearized asymptotic stability result for a Caputo-Katugampola fractional-order systems is described. An application is given to demonstrate the validity of the proposed results.

Dynamical Systems · Mathematics 2018-04-02 D. Boucenna , A. Ben Makhlouf , O. Naifar , A. Guezane-Lakoud , M. A. Hammami

The main purpose of this paper is to study the fractional-order system with Caputo derivative associated to single Stokes pulse. The dynamic behavior for this fractional model (called the fractional Stokes system) is investigated,…

Dynamical Systems · Mathematics 2025-10-14 Mihai Ivan

In the theoretical research of Hepatitis B virus, mathematical models of its transmission mechanism have been thoroughly investigated, while the dynamics of the immune process in vivo have not. At present, nearly all the existing models are…

Chaotic Dynamics · Physics 2019-12-09 Xiaohe Yu , Fei Gao , Xingluan Wang , Jiangtao Zhang

We study epidemic Susceptible-Infected-Susceptible models in the fractional setting. The novelty is to consider models in which the susceptible and infected populations evolve according to different fractional orders. We study a model based…

Optimization and Control · Mathematics 2021-07-08 Caterina Balzotti , Mirko D'Ovidio , Anna Chiara Lai , Paola Loreti

We investigate the celebrated mathematical SICA model but using fractional differential equations in order to better describe the dynamics of HIV-AIDS infection. The infection process is modelled by a general functional response and the…

Optimization and Control · Mathematics 2021-01-21 Adnane Boukhouima , El Mehdi Lotfi , Marouane Mahrouf , Silverio Rosa , Delfim F. M. Torres , Noura Yousfi

Transmission dynamics of infectious diseases are often studied using compartmental mathematical models, which are commonly represented as systems of autonomous ordinary differential equations. A key step in the analysis of such models is to…

Populations and Evolution · Quantitative Biology 2025-12-15 David J. D. Earn , C. Connell McCluskey

We prove new estimates of the Caputo derivative of order $\alpha \in (0,1]$ for some specific functions. The estimations are shown useful to construct Lyapunov functions for systems of fractional differential equations in biology, based on…

Optimization and Control · Mathematics 2020-08-26 Adnane Boukhouima , Khalid Hattaf , El Mehdi Lotfi , Marouane Mahrouf , Delfim F. M. Torres , Noura Yousfi

We investigate the global dynamics of a renewal-type epidemic model with variable susceptibility. We show that in this extended model there exists a unique endemic equilibrium and prove that it is globally asymptotically stable when $R_0 >…

Dynamical Systems · Mathematics 2020-07-24 Michael T. Meehan , Daniel G. Cocks , Emma S. McBryde

We prove the theorem of linearized asymptotic stability for fractional differential equations. More precisely, we show that an equilibrium of a nonlinear Caputo fractional differential equation is asymptotically stable if its linearization…

Dynamical Systems · Mathematics 2018-08-28 N. D. Cong , T. S. Doan , S. Siegmund , H. T. Tuan

his paper describes and analyzes the spatial spread of tuberculosis (TB) on complex metapopulation, that is, networks of populations connected by migratory flows whose configurations are described in terms of connectivity distribution of…

Dynamical Systems · Mathematics 2015-03-13 Berge Tsanou , Samuel Bowong , Jean Jules Tewa

We investigate the dynamics of the hepatitis B virus by integrating variable-order calculus and discrete analysis. Specifically, we utilize the Caputo variable-order difference operator in this study. To establish the existence and…

Populations and Evolution · Quantitative Biology 2024-05-27 Meriem Boukhobza , Amar Debbouche , Lingeshwaran Shangerganesh , Delfim F. M. Torres

This paper is devoted to studying three-dimensional non-commensurate fractional order differential equation systems with Caputo derivatives. Necessary and sufficient conditions are for the asymptotic stability of such systems are obtained.

Classical Analysis and ODEs · Mathematics 2024-10-15 Kai Diethelm , Safoura Hashemishahraki , Ha Duc Thai , Hoang The Tuan

The main purpose of this paper is to study the fractional-order model with Caputo derivative associated to Lagrange system. For this fractional-order system we investigate the existence and uniqueness of solutions of initial value problem,…

Dynamical Systems · Mathematics 2022-11-22 Mihai Ivan

We will study a mathematical model of the human immunodeficiency virus (HIV) infection in the presence of combination therapy that includes within-host infectious dynamics. The deterministic model requires us to analyze asymptotic stability…

Populations and Evolution · Quantitative Biology 2017-09-04 Majid Jaberi Douraki
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