> On 18-May-2018, at 7:46 PM, Jed Brown <[email protected]> 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
