Keller-Segel chemotaxis models: A review

G Arumugam, J Tyagi - Acta Applicandae Mathematicae, 2021 - Springer
We recount and discuss some of the most important methods and blow-up criteria for
analyzing solutions of Keller-Segel chemotaxis models. First, we discuss the results …

Boundedness in a chemotaxis system with consumed chemoattractant and produced chemorepellent

S Frassu, G Viglialoro - Nonlinear Analysis, 2021 - Elsevier
We study this zero-flux attraction–repulsion chemotaxis model, with linear and superlinear
production g for the chemorepellent and sublinear rate f for the chemoattractant:(♢) ut= Δ u …

Uniform in time -estimates for an attraction-repulsion chemotaxis system with double saturation

S Frassu, RR Galván, G Viglialoro - arXiv preprint arXiv:2106.07038, 2021 - arxiv.org
In this paper we focus on an attraction-repulsion chemotaxis model with consumed signals,
formulated in bounded and smooth domains $\Omega $ of $\R^ n $, with $ n\geq 2$. We …

Boundedness for a fully parabolic Keller–Segel model with sublinear segregation and superlinear aggregation

S Frassu, G Viglialoro - Acta Applicandae Mathematicae, 2021 - Springer
This work deals with a fully parabolic chemotaxis model with nonlinear production and
chemoattractant. The problem is formulated on a bounded domain and, depending on a …

Representation of solutions of linear differential systems with pure delay and multiple delays with linear parts given by non-permutable matrices

AM Elshenhab, XT Wang - Applied Mathematics and Computation, 2021 - Elsevier
Nonhomogeneous linear systems of second order differential equations with pure delay and
multiple delays are considered. Representations of their solutions without a commutativity …

On the behaviors of solutions of systems of non-linear differential equations with multiple constant delays

O Tunç - Revista de la Real Academia de Ciencias Exactas …, 2021 - Springer
In this paper, non-perturbed and perturbed systems of non-linear differential equations with
multiple constant delays are considered. Five new theorems on the qualitative properties of …

New conditions for the oscillation of second-order differential equations with sublinear neutral terms

SS Santra, O Bazighifan, M Postolache - Mathematics, 2021 - mdpi.com
In continuous applications in electrodynamics, neural networks, quantum mechanics,
electromagnetism, and the field of time symmetric, fluid dynamics, neutral differential …

Influence of nonlinear production on the global solvability of an attraction‐repulsion chemotaxis system

G Viglialoro - Mathematische Nachrichten, 2021 - Wiley Online Library
This paper is dedicated to the attraction‐repulsion chemotaxis‐system⋄ \Diamond ut= Δ u−
χ∇·(u∇ v)+ ξ∇·(u∇ w) in Ω×(0, T max), 0= Δ v+ f (u)− β v in Ω×(0, T max), 0= Δ w+ g (u)− δ …

A stability analysis on a smoking model with stochastic perturbation

A Zeb, S Kumar, A Tesfay, A Kumar - … of Numerical Methods for Heat & …, 2022 - emerald.com
Purpose The purpose of this paper is to investigate the effects of irregular unsettling on the
smoking model in form of the stochastic model as in the deterministic model these effects are …

New aspects for oscillation of differential systems with mixed delays and impulses

SS Santra, KM Khedher, SW Yao - Symmetry, 2021 - mdpi.com
Oscillation and symmetry play an important role in many applications such as engineering,
physics, medicine, and vibration in flight. In this work, we obtain sufficient and necessary …