## Topological Methods in Nonlinear Analysis

### Asymptotic behavior of solutions of some nonlinearly damped wave equations on $\mathbb R^N$

#### Abstract

We discuss the asymptotic behavior of solutions of the nonlinearly damped wave equation $$u_{tt} +\delta \vert u_t\vert ^{m-1}u_t -\phi (x)\Delta u = \lambda u\vert u\vert ^{\beta -1}, \quad x \in \mathbb R^n, \ t \geq 0,$$ with the initial conditions $u(x,0) = u_0 (x)$ and $u_t(x,0) = u_1 (x)$, in the case where $N \geq 3$, $\delta > 0$ and $(\phi (x))^{-1} =g (x)$ is a positive function lying in $L^{p}(\mathbb R^n)\cap L^{\infty}(\mathbb R^n)$, for some $p$. We prove blow-up of solutions when the source term dominates over the damping, and the initial energy is assumed to be positive. We also discuss global existence energy decay of solutions.

#### Article information

Source
Topol. Methods Nonlinear Anal., Volume 18, Number 1 (2001), 73-87.

Dates
First available in Project Euclid: 22 August 2016

Permanent link to this document
https://projecteuclid.org/euclid.tmna/1471876533

Mathematical Reviews number (MathSciNet)
MR1888495

Zentralblatt MATH identifier
1199.35229

#### Citation

Karachalios, Nikos; Stavrakakis, Nikos. Asymptotic behavior of solutions of some nonlinearly damped wave equations on $\mathbb R^N$. Topol. Methods Nonlinear Anal. 18 (2001), no. 1, 73--87. https://projecteuclid.org/euclid.tmna/1471876533

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