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# PCBDDCSetDofsSplitting
Set the `IS` defining fields of the global matrix 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCBDDCSetDofsSplitting(PC pc, PetscInt n_is, IS ISForDofs[])
```
Collective


## Input Parameters

- ***pc -*** the preconditioning context
- ***n_is -*** number of index sets defining the fields
- ***ISForDofs -*** array of `IS` describing the fields in global ordering





## Note
Any process can list any global node. Not all nodes need to be listed: unlisted nodes will belong to the complement field.


## See Also
 `PCBDDC`, `PCBDDCSetDofsSplittingLocal()`

## Level
intermediate

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