@Article{EAJAM-10-3, author = {Ming, Li and Zhoushun, Zheng and Pan, Kejia and Yue, Xiaoqiang}, title = {An Efficient Newton Multiscale Multigrid Method for 2D Semilinear Poisson Equations}, journal = {East Asian Journal on Applied Mathematics}, year = {2020}, volume = {10}, number = {3}, pages = {620--634}, abstract = {
An efficient Newton multiscale multigrid (Newton-MSMG) for solving large
nonlinear systems arising in the fourth-order compact difference discretisation of 2D
semilinear Poisson equations is presented. The Newton-MG method is employed to calculate approximation solutions on coarse and fine grids and then a completed Richardson extrapolation is used to construct a sixth-order extrapolated solution on the entire
fine grid directly. The method is applied to two nonlinear Poisson-Boltzmann equations
and numerical simulations show that the Newton-MSMG method is a cost-effective approach with the sixth-order accuracy.