PETSc version 3.16.6

PCDeflationSetSpaceToCompute

Set deflation space type and size to compute.

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

Logically Collective

	pc	- the preconditioner context
	type	- deflation space type to compute (or PETSC_IGNORE)
	size	- size of the space to compute (or PETSC_DEFAULT)

	-pc_deflation_compute_space <haar>	- compute PCDeflationSpaceType deflation space
	-pc_deflation_compute_space_size <1>	- size of the deflation space

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

The deflation space is computed in PCSetUp().

intermediate