Krylov subspace acceleration for nonlinear multigrid schemes (Q1381072)

The authors present a Krylov subspace acceleration technique for nonlinear partial differential equations. As preconditioners they use nonlinear multigrid schemes such as the full approximation scheme. The benefits of nonlinear multigrid used in combination with the new accelerator are illustrated by different nonlinear elliptic scalar problems, such as the Bratu problem, and by systems of nonlinear equations, such as the Navier-Stokes equations.