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Discrete and Continuous Dynamical Systems
Article . 2003 . Peer-reviewed
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Global attractors for damped semilinear wave equations

Global attractors for damped semilinear wave equations.
Authors: Ball, J;

Global attractors for damped semilinear wave equations

Abstract

The nonlinear damped wave equation \[ u_{tt}+\beta u_t-\Delta u+f(u)=0 \] is considered on a bounded domain \(\Omega\subset {\mathbb R}^n\) imposing Dirichlet boundary conditions. For the nonlinearity it is assumed that \(\liminf_{| u| \to\infty}f(u)/u>-\lambda_1\), with \(\lambda_1\) the first eigenvalue of \(-\Delta\). In addition, the growth condition \(| f(u)| \leq C(1+| u| ^{n/(n-2)})\) is supposed if \(n\geq 3\), whereas \(f\) may grow exponentially for \(n=2\). The main result of the paper asserts that the equation has a connected global attractor in \(H_0^1(\Omega)\times L^2(\Omega)\), identifying \(u\) with \((u, u_t)\). It is further shown that for each global orbit in the attractor the \(\alpha\)- resp.~\(\omega\)-limit set is a connected subset of the critical points of the Lyapunov functional \(V(u, u_t)=\int_\Omega\{(1/2)u_t^2+(1/2)| \nabla u| ^2+F(u)\}\,dx\), where \(F'=f\). If the set of critical points is totally disconnected, then the solutions do not only approach the attractor as a set, but they converge to an individual critical point as \(t\to\pm\infty\). The proofs rely on the application of suitable abstract results concerning the existence of attractors.

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United Kingdom
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Keywords

damping, critical exponent, Dirichlet boundary conditions, bounded domain, generalized semiflow, asymptotic compactness, attractor, semilinear wave equation, nonuniqueness, Attractors, General theory of infinite-dimensional dissipative dynamical systems, nonlinear semigroups, evolution equations, Attractors and their dimensions, Lyapunov exponents for infinite-dimensional dissipative dynamical systems, Second-order nonlinear hyperbolic equations

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
302
Top 1%
Top 1%
Top 10%
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