Results 51 to 60 of about 388 (128)

Lyapunov function for cosmological dynamical system

Demonstratio Mathematica, 2017
We prove the asymptotic global stability of the de Sitter solution in the Friedmann-Robertson-Walker conservative and dissipative cosmology. In the proof we construct a Lyapunov function in an exact form and establish its relationship with the first ...
Szydłowski Marek, Krawiec Adam
doaj   +1 more source

Multiple time scales method for a two dimensional system with distributed delays

Annals of the West University of Timisoara: Mathematics and Computer Science
Building on the simplified mathematical model derived from the dynamics of the hypothalamic-pituitary-adrenal (HPA) axis, which describes the interactions between ACTH and cortisol through a system of differential equations with distributed delays, this ...
Matei Maria Roxana
doaj   +1 more source

Study of transmission pattern of COVID-19 among cardiac and noncardiac population using a nonlinear mathematical model

Computational and Mathematical Biophysics
Recent studies have intensified the risk of post-COVID-19 cardiovascular diseases. In an effort to understand the intricate dynamics of COVID-19 infection, this article suggests a four-compartment model to portray the dynamic interplay between the ...
Shirisha Gopishetty, Vernekar Saroj
doaj   +1 more source

Role of limited medical resources in an epidemic model with media report and general birth rate

Infectious Disease Modelling
This paper formulates an SEIRSHM epidemic model with general birth rate, media report and limited medical resources. Firstly, the well-posedness of the solutions and the extinction of the disease are discussed.
Yicheng Hao, Yantao Luo, Zhidong Teng
doaj   +1 more source

A class of diffusive delayed viral infection models with general incidence function and cellular proliferation. [PDF]

Arab J Math, 2023
Nangue A, Tacteu Fokam WA.
europepmc   +1 more source

Analysis of backward bifurcation induced by nonlinear vertical transmission in COVID-19 dynamics with optimal control

Computational and Mathematical Biophysics
A mathematical model is designed to investigate transmission dynamics of COVID-19 in a setting where both horizontal and vertical transmission of COVID-19 occur concurrently.
Wangari Isaac Mwangi, Lebelo Ramoshweu S., Sangotola Adekunle O., Chuma Furaha M., Olaniyi Samson, Simiyu Hanningtone Meshack   +5 more
doaj   +1 more source

Stability analysis for the phytoplankton-zooplankton model with depletion of dissolved oxygen and strong Allee effects

Results in Engineering
The photosynthetic activity of phytoplankton in the seas is responsible for an estimated 50–80 % of the world's oxygen generation. Both phytoplankton and zooplankton require some of this synthesized oxygen for cellular respiration.
Ahmed Ali, Shireen Jawad, Ali Hasan Ali, Matthias Winter   +3 more
doaj   +1 more source

Dynamics of a diffusive HTLV and HIV coinfection model with macrophages, latent cells and two delays

Journal of Biological Dynamics
Human T-lymphotropic virus (HTLV) and human immunodeficiency virus (HIV) are two retroviruses that pose a certain threat to human psychology and physiology. In this paper, we propose a diffusive HTLV and HIV coinfection model with macrophages, two delays,
Hui Miao, Xiaomei Feng
doaj   +1 more source

Modelling measles transmission dynamics and the impact of control strategies on outbreak Management

Journal of Biological Dynamics
Measles is a highly contagious and potentially fatal disease, despite the availability of effective immunizations. This study formulates a deterministic mathematical model to investigate the transmission dynamics of measles, with eight compartments ...
Olumuyiwa James Peter
doaj   +1 more source

Dynamics of a fractional COVID-19 model with immunity using harmonic incidence mean-type. [PDF]

J Appl Math Comput, 2023
Mohankumar N, Rajagopal L.
europepmc   +1 more source