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math.NA2016
Substructuring preconditioners with novel interface solvers for general elliptic-type equations in three dimensions
Qiya Hu, Shaoliang Hu
In this paper we propose two variants of the substructuring preconditioner for solving three-dimensional elliptic-type equations with strongly discontinuous coefficients. In the ne…
math.NA2016
Novel multilevel preconditioners for the systems arising from plane wave discretization of Helmholtz equations with large wave numbers
Qiya Hu, Xuan Li
In this paper we are concerned with fast algorithms for the systems arising from the plane wave discretizations for two-dimensional Helmholtz equations with large wave numbers. We…