PETSc version 3.15.5

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().

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