## PF

PETSc functions (PF objects) are used to compute grid functions, element functions, etc.

Beginner - Basic usage | PF | PFApplyVec | PFSet
PFApply | PFDestroy | PFType
Intermediate - Setting options for algorithms and data structures | PFGetType | PFSetFromOptions | PFSetType
Advanced - Setting more advanced options and customization | PFRegisterAll | PFRegisterDynamic |
Developer - Interfaces intended primarily for library developers, not for typical applications programmers | PFCreate | PFView |

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