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# PCBDDCCreateFETIDPOperators
Create FETI-DP operators 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCCreateFETIDPOperators(PC pc, PetscBool fully_redundant, const char *prefix, Mat *fetidp_mat, PC *fetidp_pc)
```
Collective


## Input Parameters

- ***pc -*** the `PCBDDC` preconditioning context (setup should have been called before)
- ***fully_redundant -*** true for a fully redundant set of Lagrange multipliers
- ***prefix -*** optional options database prefix for the objects to be created (can be `NULL`)



## Output Parameters

- ***fetidp_mat -*** shell FETI-DP matrix object
- ***fetidp_pc  -*** shell Dirichlet preconditioner for FETI-DP matrix





## Note
Currently the only operations provided for FETI-DP matrix are `MatMult()` and `MatMultTranspose()`


## See Also
 `PCBDDC`, `PCBDDCMatFETIDPGetRHS()`, `PCBDDCMatFETIDPGetSolution()`

## Level
developer

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

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex59.c.html">src/ksp/ksp/tutorials/ex59.c</A><BR>

## Implementations

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


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


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