:orphan:
# PCTelescopeSetReductionFactor
Sets the factor by which the original number of MPI ranks will been reduced by.
## Synopsis
```
#include "petscksp.h"
#include "petscdm.h"
PetscErrorCode PCTelescopeSetReductionFactor(PC pc, PetscInt fact)
```
Not Collective
## Input Parameter
- ***pc -*** the preconditioner context
## Output Parameter
- ***fact -*** the reduction factor
## See Also
`PCTELESCOPE`, `PCTelescopeGetReductionFactor()`
## Level
advanced
## Location
src/ksp/pc/impls/telescope/telescope.c
## Implementations
PCTelescopeSetReductionFactor_Telescope in src/ksp/pc/impls/telescope/telescope.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/telescope/telescope.c)
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