Existence, regularity and upper semicontinuity of pullback attractors for the evolution process associated to a neural field model

In this work we study the pullback dynamics of a class of nonlocal non-autonomous evolution equations for neural fields in a bounded smooth domain $\Omega$ in $\mathbb{R}^N$ \[ \begin{cases} \partial_t u(t,x) =- u(t,x) + \displaystyle\int_{\mathbb{R}^N} J(x,y)f(t,u(t,y))dy,\ t\geq\tau,\ x \in...

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Bibliographic Details
Main Authors: Flank David Bezerra, Antônio Pereira, Severino da Silva
Format: Article
Language:English
Published: University of Szeged 2017-05-01
Series:Electronic Journal of Qualitative Theory of Differential Equations
Subjects:
Online Access:http://www.math.u-szeged.hu/ejqtde/periodica.html?periodica=1&paramtipus_ertek=publication&param_ertek=5731
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Summary:In this work we study the pullback dynamics of a class of nonlocal non-autonomous evolution equations for neural fields in a bounded smooth domain $\Omega$ in $\mathbb{R}^N$ \[ \begin{cases} \partial_t u(t,x) =- u(t,x) + \displaystyle\int_{\mathbb{R}^N} J(x,y)f(t,u(t,y))dy,\ t\geq\tau,\ x \in \Omega,\\ u(\tau,x)=u_\tau(x),\ x\in\Omega, \end{cases} \] with $u(t,x)= 0,\ t\geq\tau,\ x \in\mathbb{R}^N\backslash\Omega$, where the integrable function $J: \mathbb{R}^N \times \mathbb{R}^{N}\to \mathbb{R}$ is continuously differentiable, $\int_{\mathbb{R}^N} J(x,y) dy = \int_{\mathbb{R}^N} J(x,y) dx= 1$ and symmetric i.e., $J(x,y)=J(y,x)$ for any $x,y \in \mathbb{R}^N$. Under suitable assumptions on the nonlinearity $f: \mathbb{R}^2\to\mathbb{R}$, we prove existence, regularity and upper semicontinuity of pullback attractors for the evolution process associated to this problem.
ISSN:1417-3875