In general, no. A fixed number of Krylov iterations (CG, GMRES, etc.) is a nonlinear operation.
A fixed number of iterations of a method with a fixed polynomial, such as Chebyshev, is a linear operation so you don't need a flexible outer method. Ramakrishnan Thirumalaisamy <rthirumalaisam1...@sdsu.edu> writes: > Hi, > > I have a Krylov solver with a preconditioner that is also a Krylov solver. > I know I can use "fgmres" for the outer solver but can I use gmres for the > outer solver with a fixed number of iterations in the Krylov > preconditioners? > > > Thanks, > Rama
