Results 21 to 30 of about 20,865 (289)

Exponential Attractors for a Doubly Nonlinear Equation

open access: yesJournal of Mathematical Analysis and Applications, 1994
The authors investigate the following scalar PDE: \[ \partial_ t \beta (u) = \Delta u - g(x,u) \quad \text{on} \quad \mathbb{R}_ + \times \Omega \tag{1} \] with \(u=0\) on \(\mathbb{R}_ + \times \partial \Omega\) and \(\beta (u(0,x)= \beta (u_ 0(x))\) for \(x \in \Omega\) for some given \(u_ 0\). Here \(\Omega \subseteq \mathbb{R}^ d\) with \(d \leq 3\)
Eden, A., Rakotoson, J.M.
openaire   +2 more sources

Lower semicontinuity of attractors for non-autonomous dynamical systems [PDF]

open access: yes, 2009
This paper is concerned with the lower semicontinuity of attractors for semilinear non-autonomous differential equations in Banach spaces. We require the unperturbed attractor to be given as the union of unstable manifolds of time-dependent hyperbolic
Abreu   +9 more
core   +1 more source

Some cosmological consequences of higher dimensional Klein–Gordon–Rastall theory

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
Using dynamical system analysis, we investigate some cosmological consequences of Rastall gravity coupled to a scalar field (called the Klein–Gordon–Rastall theory) with exponential scalar potential turned on in higher dimensions.
Tegar Ari Widianto   +4 more
doaj   +1 more source

Qualitative Study of a 4D Chaos Financial System

open access: yesComplexity, 2018
Some dynamics of a new 4D chaotic system describing the dynamical behavior of the finance are considered. Ultimate boundedness and global attraction domain are obtained according to Lyapunov stability theory.
Fuchen Zhang   +4 more
doaj   +1 more source

Exponential Stability and Global Attractors for a Thermoelastic Bresse System

open access: yesAdvances in Difference Equations, 2010
We consider the stability properties for thermoelastic Bresse system which describes the motion of a linear planar shearable thermoelastic beam. The system consists of three wave equations and two heat equations coupled in certain pattern.
Ma Zhiyong
doaj   +2 more sources

A q-deformed nonlinear map [PDF]

open access: yes, 2004
A scheme of q-deformation of nonlinear maps is introduced. As a specific example, a q-deformation procedure related to the Tsallis q-exponential function is applied to the logistic map.
C Tsallis   +13 more
core   +2 more sources

Exponential Attractor for Coupled Ginzburg-Landau Equations Describing Bose-Einstein Condensates and Nonlinear Optical Waveguides and Cavities

open access: yesAbstract and Applied Analysis, 2013
The existence of the exponential attractors for coupled Ginzburg-Landau equations describing Bose-Einstein condensates and nonlinear optical waveguides and cavities with periodic initial boundary is obtained by showing Lipschitz continuity and the ...
Gui Mu, Jun Liu
doaj   +1 more source

Heteroclinic Chaos, Chaotic Itinerancy and Neutral Attractors in Symmetrical Replicator Equations with Mutations

open access: yes, 2000
A replicator equation with mutation processes is numerically studied. Without any mutations, two characteristics of the replicator dynamics are known: an exponential divergence of the dominance period, and hierarchical orderings of the attractors.
Chawanya T.   +11 more
core   +2 more sources

On an exponential attractor for a class of PDEs with degenerate diffusion and chemotaxis [PDF]

open access: yes, 2017
In this article we deal with a class of strongly coupled parabolic systems that encompasses two different effects: degenerate diffusion and chemotaxis.
A. Eden   +30 more
core   +2 more sources

Systemic modeling of chaotic EEG during human sleep

open access: yesInformatics in Medicine Unlocked, 2023
The use of chaos theory in modeling biological signals is becoming increasingly common, especially in EEG signal processing for predicting and detecting different brain states.
Mahmoud Alipour   +1 more
doaj   +1 more source

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