petsc-3.13.6 2020-09-29

PCBDDCSetCoarseningRatio

Set coarsening ratio used in multilevel

#include "petscpc.h" 
PetscErrorCode PCBDDCSetCoarseningRatio(PC pc,PetscInt k)

Logically collective on PC

	pc	- the preconditioning context
	k	- coarsening ratio (H/h at the coarser level)

-pc_bddc_coarsening_ratio -

Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level

intermediate