Hi I can trying to solve a linear system
(A+B)x=b where A is the standard finite difference Laplacian matrix and B has only a few elements (i.e. B's number of non-zero entries is much much smaller than A's). Is it possible to precondition by applying DMMG on A (like in ex34.c) in a KSP solver? Is there an example that I can follow to set this up? Thanks, Shao-Ching
