Results 1 to 10 of about 130 (112)

Existence of positive periodic solutions for first-order nonlinear differential equations with multiple time-varying delays

Open Mathematics, 2022
This study elucidates the sufficient conditions for the first-order nonlinear differential equations with periodic coefficients and time-varying delays to have positive periodic solutions.
Han Xiaoling, Lei Ceyu
doaj   +1 more source

Detections and SIR simulations of the COVID-19 pandemic waves in Ukraine

Computational and Mathematical Biophysics, 2021
Background. Unfortunately, the COVID-19 pandemic is still far from stabilizing. Of particular concern is the sharp increase in the number of diseases in June-July, September-October 2020 and February-March 2021.
Nesteruk Igor
doaj   +1 more source

On the solution of (n+1)-dimensional fractional M-Burgers equation

Alexandria Engineering Journal, 2021
In the paper, (n+1)-dimensional fractional M-Burgers equation with a force term in the sense of the Caputo fractional derivative is considered. We solve this equation using homotopy perturbation method (HPM) and find its approximate analytical solution ...
Adem Kilicman, Rachana Shokhanda, Pranay Goswami   +2 more
doaj   +1 more source

Computational dynamics of predator-prey model with the power-law kernel

Results in Physics, 2021
Evolution system which contains fractional derivatives can give rise to useful mathematical model for describing some important real-life or physical scenarios.
Kolade M. Owolabi
doaj   +1 more source

Fundamental solutions to the stochastic perturbed nonlinear Schrödinger’s equation via gamma distribution

Results in Physics, 2021
We introduce a new stochastic robust solver to solve several classes of nonlinear stochastic partial differential equations (NSPDEs). This solver presents the closed formula for the stochastic solutions.
Yousef F. Alharbi, M.A. Sohaly, Mahmoud A.E. Abdelrahman   +2 more
doaj   +1 more source

Homoclinic and heteroclinic solutions to a hepatitis C evolution model

Open Mathematics, 2018
Homoclinic and heteroclinic solutions to a standard hepatitis C virus (HCV) evolution model described by T. C. Reluga, H. Dahari and A. S. Perelson, (SIAM J. Appl. Math., 69 (2009), pp. 999–1023) are considered in this paper.
Telksnys Tadas, Navickas Zenonas, Marcinkevicius Romas, Cao Maosen, Ragulskis Minvydas   +4 more
doaj   +1 more source

Existence of positive periodic solutions for fourth-order nonlinear neutral differential equations with variable delay

Advances in Nonlinear Analysis, 2014
In this article we study the existence of positive periodic solutions for a fourth-order nonlinear neutral differential equation with variable delay.
Ardjouni Abdelouaheb, Rezaiguia Ali, Djoudi Ahcene   +2 more
doaj   +1 more source

The jump phenomenon associated with the dynamics of the duffing equation

Physics Open, 2020
The mathematical nature of the jump phenomenon associated with the damped, harmonically forced Duffing equation is investigated, as regards the amplitude of the harmonic response of the system.
M.P. Markakis
doaj   +1 more source

A study on the transmission dynamics of COVID-19 considering the impact of asymptomatic infection

Journal of Biological Dynamics, 2023
The COVID-19 epidemic has been spreading around the world for nearly three years, and asymptomatic infections have exacerbated the spread of the epidemic.
Chuanqing Xu, Zonghao Zhang, Xiaotong Huang, Kedeng Cheng, Songbai Guo, Xiaojing Wang, Maoxing Liu, Xiaoling Liu   +7 more
doaj   +1 more source

On infinite system of Caputo fractional differential inclusions with boundary conditions for convex-compact multivalued mappings

Alexandria Engineering Journal, 2020
Y. Xu (2016) investigated existence results of Caputo fractional differential equations with integral and anti-periodic boundary conditions of fractional order α∈(1,2).
Mahnaz Khanehgir, Reza Allahyari, Mohammad Mursaleen, Hojjatollah Amiri Kayvanloo   +3 more
doaj   +1 more source