[petsc-users] Matrix-free preconditioner using shell matrix

[Praveen C]

> On 18-May-2018, at 7:46 PM, Jed Brown <jed at jedbrown.org> wrote:
> 
> You don't need to use a shell matrix to implement a shell
> preconditioner.  When using a shell PC, you need to call KSPSetPC() --
> you can unwrap that from TS -> SNES -> KSP.


Thanks Jed.

Is it the case that I cannot use a shell matrix to implement a shell preconditioner ?

Best regards
praveen
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