[petsc-users] testing for and removing a null space using JFNK

[Jed Brown]

Mark Adams via petsc-users <petsc-users at mcs.anl.gov> writes:

> On Thu, Apr 4, 2019 at 7:35 AM Dave Lee <davelee2804 at gmail.com> wrote:
>
>> I already have the Navier Stokes solver. My issue is wrapping it in a JFNK
>> solver to find the periodic solutions. I will keep reading up on SVD
>> approaches, there may be some capability for something like this in SLEPc.
>>
>
> Yes, SLEPc will give you parallel eigen solvers, etc.

Even so, computing a null space will be *much* more expensive than solving linear systems.