52 citations · 63 across the 10 of their papers we have counts for
11 papers
Fourier Transform-Based Computation of Two-Electron Four-Center Coulomb Repulsion Integrals
William Chen, Lior Silberman, Ury Segal +1
We present a Fourier-based method for evaluating two-electron four-center Coulomb repulsion integrals over Slater-type orbitals. Spherical Fourier-Bessel coefficients of the convol…
Preconditioning for Diffuse Interface Tumor Growth Models
Jessica Bosch, Pelin Çiloğlu, Chen Greif +1
Computational models of tumor growth form a contemporary area of study. Diffuse interface models have been proposed as an important tool for cancer modeling. In this work, we consi…
Block Preconditioners for the Marker-and-Cell Discretization of the Stokes-Darcy Equations
Chen Greif, Yunhui He
We consider the problem of iteratively solving large and sparse double saddle-point systems arising from the stationary Stokes-Darcy equations in two dimensions, discretized by the…
Augmentation-Based Preconditioners for Saddle-Point Systems with Singular Leading Blocks
Susanne Bradley, Chen Greif
We consider the iterative solution of symmetric saddle-point matrices with a singular leading block. We develop a new ideal positive definite block diagonal preconditioner that yie…
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…