Energy decay for the Cauchy problem of the linear wave equation of variable coefficients with dissipation

Abstract

Decay of the energy for the Cauchy problem of the wave equation of variable coefficients with a dissipation is considered. It is shown that whether a dissipation can be localized near infinity depends on the curvature properties of a Riemannian metric given by the variable coefficients. In particular, some criteria on curvature of the Riemannian manifold for a dissipation to be localized are given.

Keywords

Wave equation / Riemannian metric / Localized dissipation near infinity

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