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# PCSORGetOmega
Gets the SOR relaxation coefficient, omega (where omega = 1.0 by default). 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCSORGetOmega(PC pc, PetscReal *omega)
```
Logically Collective


## Input Parameter

- ***pc -*** the preconditioner context



## Output Parameter

- ***omega -*** relaxation coefficient (0 < omega < 2).



## Options Database Key

- ***-pc_sor_omega <omega> -*** Sets omega





## See Also
 `PCSOR`, `PCSORSetSymmetric()`, `PCSORSetIterations()`, `PCEisenstatSetOmega()`, `PCSORSetOmega()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/sor/sor.c.html#PCSORGetOmega">src/ksp/pc/impls/sor/sor.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/sor/sor.c.html#PCSORGetOmega_SOR">PCSORGetOmega_SOR in src/ksp/pc/impls/sor/sor.c</A><BR>


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


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