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math.NA2013★ 31 cited
A Robust Multilevel Method for Hybridizable Discontinuous Galerkin Method for the Helmholtz Equation
Huangxin Chen, Peipei Lu, Xuejun Xu
A robust multilevel preconditioner based on the hybridizable discontinuous Galerkin method for the Helmholtz equation with high wave number is presented in this paper. There are tw…
math.NA2013★ 1 cited
Multilevel Preconditioner with Stable Coarse Grid Corrections for the Helmholtz Equation
Huangxin Chen, Haijun Wu, Xuejun Xu
In this paper we consider a class of robust multilevel precontioners for the Helmholtz equation with high wave number. The key idea in this work is to use the continuous interior p…