[petsc-users] MATNEST with shell matrices

[Boyce Griffith]

On 2/21/13 6:55 PM, Jed Brown wrote:
>         But if you really want to use those other vector space wrappers,
>         you can
>         use VecNest.
>
>
>     Great --- this is what I had hoped and what Amneet was trying to
>     figure out.
>
>
> If you really don't want to have an IS, you can use VecNestGetSubVec(),
> just be warned that this makes your code more brittle and harder to
> interoperate with.

There is no such thing as an IS for these data structures in the current 
implementation.

-- Boyce