petsc-3.14.6 2021-03-30

MatSchurComplementGetKSP

Gets the KSP object that is used to invert A00 in the Schur complement matrix S = A11 - A10 ksp(A00,Ap00) A01

#include "petscksp.h" 
PetscErrorCode MatSchurComplementGetKSP(Mat S, KSP *ksp)

Not Collective

- matrix obtained with MatCreateSchurComplement() (or equivalent) and implementing the action of A11 - A10 ksp(A00,Ap00) A01

ksp

- the linear solver object

-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.

intermediate