<div dir="ltr">On Thu, Jan 10, 2013 at 10:44 AM, w_ang_temp <span dir="ltr"><<a href="mailto:w_ang_temp@163.com" target="_blank">w_ang_temp@163.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="line-height:1.7;font-size:14px;font-family:arial"><p>Hello,</p>
<p> I want to determine the positive definiteness. So I want to know</p>
<p>if it is a right way.</p>
<p> I use "-ksp_type cg -pc_type none". You know, CG does not work for</p>
<p>indefinite matrices. I get "Linear solve did not converge due to </p>
<p>DIVERGED_INDEFINITE_MAT". From the information, I think it is indefinite.</p>
<p>Is it a right way?</p></div></blockquote><div><br></div><div style>Its not full proof, but it could be a diagnostic.</div><div style><br></div><div style> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="line-height:1.7;font-size:14px;font-family:arial">
<p> Thanks.</p>
<p> Jim</p>
<div></div></div><br><br><span title="neteasefooter"><span></span></span></blockquote></div><br><br clear="all"><div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener
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