MatSchurComplementComputeExplicitOperator#

Compute the Schur complement matrix explicitly

Synopsis#

Collective

Input Parameter#

Output Parameter#

  • S - the Schur complement matrix

Notes#

This can be expensive, so it is mainly for testing

Use MatSchurComplementGetPmat() to get a sparse approximation for the Schur complement suitable for use in building a preconditioner

See Also#

KSP: Linear System Solvers, MatCreateSchurComplement(), MatSchurComplementUpdate(), MatSchurComplementGetPmat()

Level#

advanced

Location#

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


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