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# PF
Abstract PETSc mathematical function that can be evaluated with `PFApply()` and may be constructed at run time (see `PFSTRING`) 
## Synopsis
```
typedef struct _p_PF *PF;
```



## See Also
 `PFCreate()`, `PFDestroy()`, `PFSetType()`, `PFApply()`, `PFApplyVec()`, `PFSet()`, `PFType`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscpf.h.html#PF">include/petscpf.h</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/pf/pfimpl.h.html#_p_PF">_p_PF in src/vec/pf/pfimpl.h</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/include/petscpf.h)


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