:orphan:
# ISLocalToGlobalMappingApplyBlock
Takes a list of integers in a local block numbering and converts them to the global block numbering 
## Synopsis
```
#include "petscis.h"  
PetscErrorCode ISLocalToGlobalMappingApplyBlock(ISLocalToGlobalMapping mapping, PetscInt N, const PetscInt in[], PetscInt out[])
```
Not Collective


## Input Parameters

- ***mapping -*** the local to global mapping context
- ***N -*** number of integers
- ***in -*** input indices in local block numbering



## Output Parameter

- ***out -*** indices in global block numbering



## Example
If the index values are {0,1,6,7} set with a call to `ISLocalToGlobalMappingCreate`(`PETSC_COMM_SELF`,2,2,{0,3}) then the mapping applied to 0
(the first block) would produce 0 and the mapping applied to 1 (the second block) would produce 3.




## Note
The `in` and `out` array parameters may be identical.


## See Also
 [](sec_scatter), `ISLocalToGlobalMappingApply()`, `ISLocalToGlobalMappingCreate()`, `ISLocalToGlobalMappingDestroy()`,
`ISLocalToGlobalMappingApplyIS()`, `AOCreateBasic()`, `AOApplicationToPetsc()`,
`AOPetscToApplication()`, `ISGlobalToLocalMappingApply()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/utils/isltog.c.html#ISLocalToGlobalMappingApplyBlock">src/vec/is/utils/isltog.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex71.c.html">src/ksp/ksp/tutorials/ex71.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/utils/isltog.c)


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