Results 41 to 50 of about 1,301 (120)

Asymptotic stability of an epidemiological fractional reaction-diffusion model

open access: yesDemonstratio Mathematica, 2023
The aim of this article is to study the known susceptible-infectious (SI) epidemic model using fractional order reaction-diffusion fractional partial differential equations [FPDEs] in order to better describe the dynamics of a reaction-diffusion SI with ...
Djebara Lamia   +2 more
doaj   +1 more source

On the existence of the solution of Burgers′ equation for n ≤ 4

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 13, Issue 4, Page 645-650, 1990., 1990
In this paper a proof of the existence of the solution of Burgers′ equation for n ≤ 4 is presented. The technique used is shown to be valid for equations with more general types of nonlinearities than is present in Burgers′ equation.
Adel N. Boules
wiley   +1 more source

Boundedness of Stable Solutions to Semilinear Elliptic Equations: A Survey

open access: yesAdvanced Nonlinear Studies, 2017
This article is a survey on boundedness results for stable solutions to semilinear elliptic problems.For these solutions, we present the currently known L∞${L^{\infty}}$ estimates that hold for all nonlinearities.Such estimates are known to hold up to ...
Cabré Xavier
doaj   +1 more source

On the solution of reaction‐diffusion equations with double diffusivity

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 10, Issue 1, Page 163-172, 1987., 1986
In this paper, solution of a pair of Coupled Partial Differential equations is derived. These equations arise in the solution of problems of flow of homogeneous liquids in fissured rocks and heat conduction involving two temperatures. These equations have been considered by Hill and Aifantis, but the technique we use appears to be simpler and more ...
B. D. Aggarwala, C. Nasim
wiley   +1 more source

Small noise asymptotic expansions for stochastic PDE's, I. The case of a dissipative polynomially bounded non linearity

open access: yes, 2011
We study a reaction-diusion evolution equation perturbed by a Gaussian noise. Here the leading operator is the innitesimal generator of a C0-semigroup of strictly negative type, the nonlinear term has at most polynomial growth and is such that the whole ...
S. Albeverio   +2 more
semanticscholar   +1 more source

Unstable periodic wave solutions of Nerve Axion diffusion equations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 10, Issue 4, Page 787-796, 1987., 1987
Unstable periodic solutions of systems of parabolic equations are studied. Special attention is given to the existence and stability of solutions.
Rina Ling
wiley   +1 more source

OPTIMAL CONTROL OF A TWO TEAMS PREY-PREDATOR INTERACTION MODEL

open access: yes, 2015
In this paper, a model of two teams of predators interacting with two teams of preys is proposed. The predator teams help each other and so do the prey teams.
S. Aly, M. Elettreby
semanticscholar   +1 more source

Blow-up analyses in nonlocal reaction diffusion equations with time-dependent coefficients under Neumann boundary conditions

open access: yesOpen Mathematics, 2020
In this paper, the blow-up analyses in nonlocal reaction diffusion equations with time-dependent coefficients are investigated under Neumann boundary conditions.
Tian Huimin, Zhang Lingling
doaj   +1 more source

Analysis of the Diffusion SIR Epidemic Model With Networked Delay and Nonlinear Incidence Rate

open access: yesJournal of Mathematics, Volume 2024, Issue 1, 2024.
This paper is concerned with the qualitative analysis of a diffusion SIR epidemic model with networked delay and nonlinear incidence rate. First, we prove the existence and uniqueness of the model by using the method of upper and lower solutions. Then, we prove that the trivial equilibrium (0, 0) is unstable; the disease‐free equilibrium (N, 0) is ...
Xiangyu Tang, Yujuan Chen, Mengxin Chen
wiley   +1 more source

The evolution of resource distribution, slow diffusion, and dispersal strategies in heterogeneous populations

open access: yesFrontiers in Applied Mathematics and Statistics, 2023
Population diffusion in river-ocean ecologies and for wild animals, including birds, mainly depends on the availability of resources and habitats. This study explores the dynamics of the resource-based competition model for two interacting species in ...
Ishrat Zahan   +4 more
doaj   +1 more source

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