An Integral Evolution Formula for the Wave Equation

@article{Alpert2000AnIE,
  title={An Integral Evolution Formula for the Wave Equation},
  author={Bradley K. Alpert and Leslie Greengard and Thomas M. Hagstrom},
  journal={Journal of Computational Physics},
  year={2000},
  volume={162},
  pages={536-543}
}
We present a new time-symmetric evolution formula for the scalar wave equation. It is simply related to the classical D'Alembert or spherical means representations, but applies equally well in two space dimensions. It can be used to develop stable, robust numerical schemes on irregular meshes. 

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