A generalized optimal fourth-order finite difference scheme for a 2D Helmholtz equation with the perfectly matched layer boundary condition.

Hatef Dastour Wenyuan Liao A generalized optimal fourth-order finite difference scheme for a 2D Helmholtz equation with the perfectly matched layer boundary condition. 2019 abs/1908.07403 CoRR http://arxiv.org/abs/1908.07403 db/journals/corr/corr1908.html#abs-1908-07403