On the pointwise decay estimate for the wave equation with compactly supported forcing term

Hideo Kubo
2015 Communications on Pure and Applied Analysis  
In this paper we derive a new type of pointwise decay estimates for solutions to the Cauchy problem for the wave equation in 2D, in the sense that one can diminish the weight in the time variable for the forcing term if it is compactly supported in the spatial variables. As an application of the estimate, we also establish an improved decay estimate for the solution to the exterior problem in 2D.
doi:10.3934/cpaa.2015.14.1469 fatcat:bqtbkawqszayxki73p3nt6qv7u