petsc-3.8.4 2018-03-24
MatSchurComplementGetKSP
Gets the KSP object that is used to invert A00 in the Schur complement matrix S = A11 - A10 ksp(A00,Ap00) A01
Synopsis
#include "petscksp.h"
PetscErrorCode MatSchurComplementGetKSP(Mat S, KSP *ksp)
Not Collective
Input Parameter
S -matrix obtained with MatCreateSchurComplement() (or equivalent) and implementing the action of A11 - A10 ksp(A00,Ap00) A01
Output Parameter
ksp -the linear solver object
Options Database
-fieldsplit_<splitname_0>_XXX sets KSP and PC options for the 0 -split solver inside the Schur complement used in PCFieldSplit; default <splitname_0> is 0.
See Also
MatSchurComplementSetKSP(), MatCreateSchurComplement(), MatCreateNormal(), MatMult(), MatCreate()
Level:intermediate
Location:src/ksp/ksp/utils/schurm.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages