Notes: Using a Krylov method inside another Krylov method can be dangerous (you get divergence or the incorrect answer) unless you use KSPFGMRES as the other Krylov method
Developer Notes: PCApply_KSP() uses the flag set by PCSetInitialGuessNonzero(), I think this is totally wrong, because it is then not using this inner KSP as a preconditioner (that is a linear operator applied to some vector), it is actually just using the inner KSP just like the outer KSP.
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages