petsc-3.12.4 2020-02-04
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# PCDeflationSetLevels

Set the maximum level of deflation nesting.

### Synopsis

    #include "petscksp.h"
    PetscErrorCode PCDeflationSetLevels(PC pc,PetscInt max)

Logically Collective

### Input Parameters

| pc | - the preconditioner context
| max | - maximum deflation level

### Options Database Keys

-pc_deflation_max_lvl <0> -maximum number of levels for multilevel deflation

### See Also

PCDeflationSetSpaceToCompute(), PCDeflationSetSpace(), PCDEFLATION

### Level

intermediate

### Location

src/ksp/pc/impls/deflation/deflation.c

### Implementations

PCDeflationSetLevels_Deflation in src/ksp/pc/impls/deflation/deflation.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages