一本关于多重网格法的书，适合用于流体等专业学生-A book on multi-grid method, suitable for the fluid, and other professional students

GPAW is a density-functional theory (DFT) Python code based on the projector-augmented wave (PAW) method and the atomic simulation environment (ASE). It uses real-space uniform grids and multigrid methods, atom-centered basis-functions or plane-waves