petsc-3.14.6 2021-03-30

PCFieldSplitSchurGetS

extract the MatSchurComplement object used by this PC in case it needs to be configured separately

#include "petscpc.h" 
PetscErrorCode  PCFieldSplitSchurGetS(PC pc,Mat *S)

Not collective

- the preconditioner context

- the Schur complement matrix

This matrix should not be destroyed using MatDestroy(); rather, use PCFieldSplitSchurRestoreS().

advanced