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# KSPBCGSLSetPol
Sets the type of polynomial part that will be used in the  `KSPCBGSL` solver. 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode KSPBCGSLSetPol(KSP ksp, PetscBool uMROR)
```
Logically Collective


## Input Parameters

- ***ksp -*** iterative context of type `KSPCBGSL`
- ***uMROR -*** set to PETSC_TRUE when the polynomial is a convex combination of an MR and an OR step.



## Options Database Keys

- ***-ksp_bcgsl_cxpoly -*** use enhanced polynomial
- ***-ksp_bcgsl_mrpoly -*** use standard polynomial





## See Also
 [](ch_ksp), `KSP`, `KSPBCGSL`, `KSPCreate()`, `KSPSetType()`, `KSPCBGSL`, `KSPBCGSLSetUsePseudoinverse()`, `KSPBCGSLSetEll()`, `KSPBCGSLSetXRes()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/impls/bcgsl/bcgsl.c.html#KSPBCGSLSetPol">src/ksp/ksp/impls/bcgsl/bcgsl.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/ksp/impls/bcgsl/bcgsl.c)


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