petsc-3.14.6 2021-03-30

PCDeflationSetReductionFactor

Set reduction factor for the bottom PCTELESCOPE coarse problem solver.

#include "petscksp.h" 
PetscErrorCode PCDeflationSetReductionFactor(PC pc,PetscInt red)

Logically Collective

	pc	- the preconditioner context
	red	- reduction factor (or PETSC_DETERMINE)

-pc_deflation_reduction_factor <-1>

- reduction factor on bottom level coarse problem for PCTELESCOPE

Default is computed based on the size of the coarse problem.

intermediate