petsc-3.14.6 2021-03-30
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MatSchurComplementComputeExplicitOperator

 Compute the Schur complement matrix explicitly

Synopsis

#include "petscksp.h" 
PetscErrorCode MatSchurComplementComputeExplicitOperator(Mat M, Mat *S)
Collective on M

Input Parameter

M - the matrix obtained with MatCreateSchurComplement()

Output Parameter

S - the Schur complement matrix

Note: This can be expensive, so it is mainly for testing

See Also

MatCreateSchurComplement(), MatSchurComplementUpdate()

Level

advanced

Location

src/ksp/ksp/utils/schurm/schurm.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages