Results 41 to 50 of about 130 (112)

A model of competing species that exhibits zip bifurcation

open access: yesRevista Integración, 2017
The purpose of this paper is to present a concrete model of competing population species that exhibits a phenomenon called zip bifurcation. The Zip Bifurcation was introduced by Farkas in 1984 for a three dimensional ODE prey-predator system describing a
Luis F. Echeverri   +2 more
doaj   +1 more source

Local existence result of the single dopant diffusion including cluster reactions of high order

open access: yesAbstract and Applied Analysis, Volume 6, Issue 1, Page 13-34, 2001., 2001
We consider the pair diffusion process which includes cluster reactions of high order. We are able to prove a local (in time) existence result in arbitrary space dimensions. The model includes a nonlinear system of reaction‐drift‐diffusion equations, a nonlinear system of ordinary differential equations in Banach spaces, and a nonlinear elliptic ...
R. Bader, W. Merz
wiley   +1 more source

A Comparative Study of the Pendulum Equation Using Two Analytical Methods

open access: yesJournal of Mathematics, Volume 2024, Issue 1, 2024.
This paper presents a comprehensive comparison between the modified harmonic balance method (MHBM) and He’s frequency formulation (HFF) for solving the nonlinear dynamics of an excited pendulum constrained by a crank‐shaft‐slider mechanism (CSSM).
Nazmul Sharif   +2 more
wiley   +1 more source

Existence and uniqueness of a classical solution to a functional‐differential abstract nonlocal Cauchy problem

open access: yesInternational Journal of Stochastic Analysis, Volume 12, Issue 1, Page 91-97, 1999., 1998
The aim of this paper is to investigate the existence and uniqueness of a classical solution to a functional‐differential abstract nonlocal Cauchy problem in a general Banach space. For this purpose, a special kind of a mild solution is introduced and the Banach contraction theorem and a modified Picard method are applied.
Ludwik Byszewski
wiley   +1 more source

Riemann-Liouville fractional integro-differential equations with fractional nonlocal integral boundary conditions

open access: yesBoundary Value Problems, 2011
This article investigates a boundary value problem of Riemann-Liouville fractional integro-differential equations with fractional nonlocal integral boundary conditions.
Ahmad Bashir, Nieto Juan
doaj  

Friedmann equations as n-dimensional dynamical system

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2023
In this paper we study dynamics of the standard cosmological model of the universe assuming that it is filled with n types of non-interacting barotropic perfect fluids.
Branković Danijela
doaj   +1 more source

On the existence of new integrable cases for Euler-Poisson equations in Newtonian fields

open access: yesAlexandria Engineering Journal, 2019
In this article, the rotational motion of a non-symmetric rigid body about a fixed point under the action of multi-Newtonian centers located on one fixed axis is considered.
Mohamed El-Borhamy
doaj   +1 more source

Normal forms of piecewise-smooth monodromic systems

open access: yesAdvances in Nonlinear Analysis
Normal form is an important tool in the study of bifurcations but, unlike those for smooth differential systems, normal forms for piecewise-smooth systems have difficulty with the near-identity transformation, which is constructed piecewise but needs to ...
Li Jiahao, Chen Xingwu, Zhang Weinian
doaj   +1 more source

Dynamics of particulate emissions in the presence of autonomous vehicles

open access: yesOpen Mathematics
Around one third of CO2{{\rm{CO}}}_{2} emissions in the atmosphere are linked to vehicular traffic. Pollutant agents have an impact on the environment, in particular, the increased presence of particulate matter (PM) creates negative effects on human ...
Briani Maya   +3 more
doaj   +1 more source

Dynamic ecological system measures

open access: yesResults in Applied Mathematics, 2019
The system decomposition theory has recently been developed for the dynamic analysis of nonlinear compartmental systems. The application of this theory to the ecosystem analysis has also been introduced in a separate article.
Huseyin Coskun
doaj   +1 more source

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