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math.NA2012★ 80 cited
A parallel sweeping preconditioner for heterogeneous 3D Helmholtz equations
Jack Poulson, Björn Engquist, Siwei Li +1
A parallelization of a sweeping preconditioner for 3D Helmholtz equations without large cavities is introduced and benchmarked for several challenging velocity models. The setup an…
physics.comp-ph2012★ 8 cited
Element orbitals for Kohn-Sham density functional theory
Lin Lin, Lexing Ying
We present a method to discretize the Kohn-Sham Hamiltonian matrix in the pseudopotential framework by a small set of basis functions automatically contracted from a uniform basis…