PETSc version 3.16.5
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# PCFactorSetReuseOrdering

When similar matrices are factored, this causes the ordering computed in the first factor to be used for all following factors.

### Synopsis

    #include "petscpc.h"
    PetscErrorCode  PCFactorSetReuseOrdering(PC pc,PetscBool flag)

Logically Collective on PC

### Input Parameters

| pc | - the preconditioner context
| flag | - PETSC_TRUE to reuse else PETSC_FALSE

### Options Database Key

| -pc_factor_reuse_ordering | - Activate PCFactorSetReuseOrdering()

### See Also

PCFactorSetReuseFill()

### Level

intermediate

### Location

src/ksp/pc/impls/factor/cholesky/cholesky.c

### Implementations

PCFactorSetReuseOrdering_Factor in src/ksp/pc/impls/factor/factor.c
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