:orphan:
# SNESNASMSetSubdomains
Manually Set the context required to restrict and solve subdomain problems in the nonlinear additive Schwarz solver 
## Synopsis
```
#include "petscsnes.h"   
PetscErrorCode SNESNASMSetSubdomains(SNES snes, PetscInt n, SNES subsnes[], VecScatter iscatter[], VecScatter oscatter[], VecScatter gscatter[])
```
Logically Collective


## Input Parameters

- ***snes -*** the SNES context
- ***n -*** the number of local subdomains
- ***subsnes -*** solvers defined on the local subdomains
- ***iscatter -*** scatters into the nonoverlapping portions of the local subdomains
- ***oscatter -*** scatters into the overlapping portions of the local subdomains
- ***gscatter -*** scatters into the (ghosted) local vector of the local subdomain





## See Also
 `SNESNASM`, `SNESNASMGetSubdomains()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/nasm/nasm.c.html#SNESNASMSetSubdomains">src/snes/impls/nasm/nasm.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/nasm/nasm.c.html#SNESNASMSetSubdomains_NASM">SNESNASMSetSubdomains_NASM in src/snes/impls/nasm/nasm.c</A><BR>


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


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