Results 1 to 10 of about 334 (177)

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

open access: yesComputational 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

Periodic and quasi-periodic solutions of a four-dimensional singular differential system describing the motion of vortices

open access: yesAdvances in Nonlinear Analysis, 2023
In this article, we consider a four-dimensional singular differential system that can describe the dynamics of configurations bearing a small number of vortices in atomic Bose-Einstein condensates.
Liang Zaitao, Li Shengjun, Li Xin
doaj   +1 more source

Role of ecotourism in conserving forest biomass: A mathematical model

open access: yesComputational and Mathematical Biophysics, 2023
Ecotourism is a form of tourism involving responsible travel to natural areas, conserving the environment, and improving the well-being of the local people.
Pathak Rachana   +6 more
doaj   +1 more source

Applications of implicit parametrizations

open access: yes, 2021
We review several applications of the implicit parametrization theorem in optimization. In nonlinear programming, we discuss both new forms, with less multipliers, of the known optimality conditions, and new algorithms of global type. For optimal control
TIBA, Dan
core   +1 more source

A note on polyexponential and unipoly Bernoulli polynomials of the second kind

open access: yesOpen Mathematics, 2021
In this paper, the authors study the poly-Bernoulli numbers of the second kind, which are defined by using polyexponential functions introduced by Kims. Also by using unipoly function, we study the unipoly Bernoulli numbers of the second kind, which are ...
Ma Minyoung, Lim Dongkyu
doaj   +1 more source

Fractional model of Ebola virus in population of bats in frame of Atangana-Baleanu fractional derivative

open access: yesResults in Physics, 2021
The paper aims to extend the model of the Ebola virus in bats to the mathematical model of fractional order using Atangana- Baleanu derivative operator.
M.A.Almuqrin   +5 more
doaj   +1 more source

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

open access: yesAlexandria 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   +2 more
doaj   +1 more source

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

open access: yesResults 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

Homoclinic and heteroclinic solutions to a hepatitis C evolution model

open access: yesOpen 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   +4 more
doaj   +1 more source

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

open access: yesResults 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   +2 more
doaj   +1 more source

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