PCDeflationSetSpaceToCompute

Set deflation space type and size to compute.

Synopsis

#include "petscksp.h" 
PetscErrorCode PCDeflationSetSpaceToCompute(PC pc, PCDeflationSpaceType type, PetscInt size)

Logically Collective

Input Parameters

• pc - the preconditioner context

• type - deflation space type to compute (or PETSC_IGNORE)

• size - size of the space to compute (or PETSC_DEFAULT)

Options Database Keys

• -pc_deflation_compute_space - compute PCDeflationSpaceType deflation space

• -pc_deflation_compute_space_size <1> - size of the deflation space

Notes

For wavelet-based deflation, size represents number of levels.

The deflation space is computed in PCSetUp().

See Also

KSP: Linear System Solvers, PCDeflationSetLevels(), PCDEFLATION

Level

intermediate

Location

src/ksp/pc/impls/deflation/deflation.c

Implementations

PCDeflationSetSpaceToCompute_Deflation() in src/ksp/pc/impls/deflation/deflation.c

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