52 citations · 63 across the 10 of their papers we have counts for
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A note on using the mass matrix as a preconditioner for the Poisson equation
Chen Greif, Yunhui He
We show that the mass matrix derived from finite elements can be effectively used as a preconditioner for iteratively solving the linear system arising from finite-difference discr…
A closed-form multigrid smoothing factor for an additive Vanka-type smoother applied to the Poisson equation
Chen Greif, Yunhui He
We consider an additive Vanka-type smoother for the Poisson equation discretized by the standard finite difference centered scheme. Using local Fourier analysis, we derive analytic…
Eigenvalue Bounds for Double Saddle-Point Systems
Susanne Bradley, Chen Greif
We derive bounds on the eigenvalues of a generic form of double saddle-point matrices. The bounds are expressed in terms of extremal eigenvalues and singular values of the associat…
HSS(0): an Improved Hermitian/Skew-Hermitian Splitting Iteration
Chen Greif, Yunhui He
We propose an improved version of the Hermitian/skew-Hermitian splitting (HSS) iterative method, which we call HSS(0), to solve non-Hermitian linear systems with a positive definit…