petsc-3.12.4 2020-02-04
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# PCGAMGASMSetUseAggs

Have the PCGAMG smoother on each level use the aggregates defined by the coarsening process as the subdomains for the additive Schwarz preconditioner.

### Synopsis

    #include "petscpc.h"
    PetscErrorCode PCGAMGASMSetUseAggs(PC pc, PetscBool flg)

Collective on PC

### Input Parameters

| pc | - the preconditioner context
| flg | - PETSC_TRUE to use aggregates, PETSC_FALSE to not

### Options Database Key

-pc_gamg_asm_use_agg -

### See Also

()

### Level

intermediate

### Location

src/ksp/pc/impls/gamg/gamg.c

### Implementations

PCGAMGASMSetUseAggs_GAMG in src/ksp/pc/impls/gamg/gamg.c
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