Article Contents
Article Contents

# Small data solutions for semilinear wave equations with effective damping

• We consider the Cauchy problem for the semi-linear damped wave equation
$u_{tt} - \Delta u + b(t)u_t = f(t,u),\qquad u(0,x) = u_0(x),\qquad u_t(0,x) = u_1(x).$
We prove the global existence of small data solution in low space dimension, and we derive $(L^m\cap L^2)-L^2$ decay estimates, for $m\in[1,2)$. We assume that the time-dependent damping term $b(t)>0$ is effective, that is, the equation inherits some properties of the parabolic equation $b(t)u_t - \Delta u = f(t,u)$.
Mathematics Subject Classification: 35L71.

 Citation:

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