#include "petscpc.h" PetscErrorCode PCFieldSplitGetSubKSP(PC pc,PetscInt *n,KSP *subksp[])Collective on KSP
| pc | - the preconditioner context |
| n | - the number of splits | |
| subksp | - the array of KSP contexts |
You must call PCSetUp() before calling PCFieldSplitGetSubKSP().
If the fieldsplit is of type PC_COMPOSITE_SCHUR, it returns the KSP object used inside the Schur complement and the KSP object used to iterate over the Schur complement. To access all the KSP objects used in PC_COMPOSITE_SCHUR, use PCFieldSplitSchurGetSubKSP().
If the fieldsplit is of type PC_COMPOSITE_GKB, it returns the KSP object used to solve the inner linear system defined by the matrix H in each loop.
Fortran Usage: You must pass in a KSP array that is large enough to contain all the local KSPs. You can call PCFieldSplitGetSubKSP(pc,n,PETSC_NULL_KSP,ierr) to determine how large the KSP array must be.