[petsc-users] GAMG and zero pivots follow up

[Jed Brown]

r<#secure method=pgpmime mode=sign>
Matthew Knepley <knepley at gmail.com> writes:
> Yikes! I did not check that. Why do we have PRECONDITIONED as the default
> for CG?

So we can do an extra reduction on each iteration?  I mean, who doesn't
want that?  ;-)