:orphan:
# PCMGSetInjection
Sets the function to be used to inject primal vectors from level l to l-1. 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode PCMGSetInjection(PC pc, PetscInt l, Mat mat)
```
Logically Collective


## Input Parameters

- ***pc -*** the multigrid context
- ***l -*** the level (0 is coarsest) to supply [Do not supply 0]
- ***mat -*** the injection matrix





## See Also
 `PCMG`, `PCMGSetRestriction()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/mg/mgfunc.c.html#PCMGSetInjection">src/ksp/pc/impls/mg/mgfunc.c</A>


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


[Index of all PC routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)