<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Well, technically yes, but I'm guessing the there is a switch that detected happy breakdown or something ... don't know.<div><br><div><div>On Mar 30, 2012, at 11:31 AM, Jed Brown wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><p>Min should also be 1, no?</p>
<div class="gmail_quote">On Mar 30, 2012 9:26 AM, "Mark F. Adams" <<a href="mailto:mark.adams@columbia.edu">mark.adams@columbia.edu</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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.<br>
<br>
Any thoughts?<br>
<br>
Mark</blockquote></div>
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