Well, technically yes, but I'm guessing the there is a switch that detected happy breakdown or something ... don't know. On Mar 30, 2012, at 11:31 AM, Jed Brown wrote:

Min should also be 1, no?

On Mar 30, 2012 9:26 AM, "Mark F. Adams" <[email protected]> wrote: I've had problems with GMRES and eigen estimates in the past but I now have a smoking gun. It seems that if you give GMRES an operator preconditioned with LU (ie, the preconditioned operator is the identity) GMRES gives me a highest eigen estimate of ~10 (way off). With CG I get a prefect max=1.0, min=0.0.

Any thoughts?

Mark