MatSchurComplementGetAinvType#

get the type of approximation for the inverse of the (0,0) block used in forming Sp in MatSchurComplementGetPmat()

Synopsis#

#include "petscksp.h" 
PetscErrorCode MatSchurComplementGetAinvType(Mat S, MatSchurComplementAinvType *ainvtype)

Not Collective

Input Parameter#

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

Output Parameter#

ainvtype - type of approximation used to form approximate Schur complement Sp = A11 - A10 inv(DIAGFORM(A00)) A01: MAT_SCHUR_COMPLEMENT_AINV_DIAG, MAT_SCHUR_COMPLEMENT_AINV_LUMP, MAT_SCHUR_COMPLEMENT_AINV_BLOCK_DIAG, or MAT_SCHUR_COMPLEMENT_AINV_FULL

See Also#

KSP: Linear System Solvers, MatSchurComplementAinvType, MatCreateSchurComplement(), MatGetSchurComplement(), MatSchurComplementGetPmat(), MatSchurComplementSetAinvType()

Level#

advanced

Location#

src/ksp/ksp/utils/schurm/schurm.c

Index of all KSP routines
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Index of all manual pages