Cactus Code Thorn DGWaveToy
Author(s)    : Erik Schnetter 
Maintainer(s): Erik Schnetter 
Licence      : LGPL
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1. Purpose

Solve the scalar wave equation



2. Equations

dt^2 u = dx^2 u

ft = dt u
fx = dx u

dt u = ft

dt ft = dx fx
dt fx = dx ft