# VECNEST
VECNEST = "nest" - Vector type consisting of nested subvectors, each stored separately. 


## Notes
This vector type reduces the number of copies for certain solvers applied to multi-physics problems.
It is usually used with MATNEST and DMComposite via DMSetVecType().


## See Also
 `VecCreate()`, `VecType`, `VecCreateNest()`, `MatCreateNest()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/impls/nest/vecnest.c.html#VECNEST">src/vec/vec/impls/nest/vecnest.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex27.c.html">src/ksp/ksp/tutorials/ex27.c.html</A><BR>


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


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