Guest Editors´ Introduction: Multigrid Computing

Multigrid methods are among the most important algorithms for computational scientists because they´re the most efficient solvers for a wide range of problems. The modern era of multi-grid methods began more than 30 years ago with the publication of Achi Brandt´s seminal papers. Although it was originally successful for solving elliptic partial differential equations (PDEs) and the linear systems that arise when they´re discretized, the basic multigrid principle of coupling multiple scales has much wider applicability