Higher order energy decay rates for damped wave equations with variable coefficients (2008)
Radu, Petronela, Todorova, Grozdena, Yordanov, Borislav
Under appropriate assumptions the energy of wave equations with damping and variable coefficients $c(x)u_{tt}-\hbox{div}(b(x)\nabla u)+a(x)u_t =h(x)$ has been shown to decay. Determining the rate of...