petsc-3.9.4 2018-09-11
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PCBDDCSetCoarseningRatio
Set coarsening ratio used in multilevel
Synopsis
#include "petscpc.h"
PetscErrorCode
PCBDDCSetCoarseningRatio
(
PC
pc,
PetscInt
k)
Logically collective on
PC
Input Parameters
pc
- the preconditioning context
k
- coarsening ratio (H/h at the coarser level)
Options Database Keys
-pc_bddc_coarsening_ratio
-
Notes
Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level
See Also
PCBDDC
,
PCBDDCSetLevels
()
Level
intermediate
Location
src/ksp/pc/impls/bddc/bddc.c
Implementations
PCBDDCSetCoarseningRatio_BDDC in src/ksp/pc/impls/bddc/bddc.c
Index of all PC routines
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Index of all manual pages