petsc-3.13.6 2020-09-29

PCFieldSplitGetSchurPre

For Schur complement fieldsplit, determine how the Schur complement will be preconditioned. See PCFieldSplitSetSchurPre() for details.

#include "petscpc.h" 
PetscErrorCode PCFieldSplitGetSchurPre(PC pc,PCFieldSplitSchurPreType *ptype,Mat *pre)

Logically Collective on PC

pc -the preconditioner context

	ptype	- which matrix to use for preconditioning the Schur complement: PC_FIELDSPLIT_SCHUR_PRE_A11, PC_FIELDSPLIT_SCHUR_PRE_SELF, PC_FIELDSPLIT_PRE_USER
	userpre	- matrix to use for preconditioning (with PC_FIELDSPLIT_PRE_USER), or NULL

intermediate