<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Mar 22, 2018 at 8:29 PM, 我 <span dir="ltr"><<a href="mailto:dayedut123@163.com" target="_blank">dayedut123@163.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi all,<br>I want to analyze the preconditioned matrix. But the KSPComputeExplicitOperator costs too much time to obtain the matrix. My origin matrix is about 3000*3000 sparse one. I noticed this function is applicable for the relative small system. What's the matrix-size limitation for this function? And for my case, any suggestions to solve it with less time?<br></div></div></blockquote><div><br></div><div>This is just a really expensive operation. There is no way around it.</div><div><br></div><div> 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;color:#000000;font-size:14px;font-family:Arial"><div>Thank you very much!<br>daye <a name="m_6587389865708374460_KSPComputeExplicitOperator"><h1><br></h1></a></div></div><br><br><span title="neteasefooter"><p> </p></span></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>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</div><div><br></div><div><a href="http://www.caam.rice.edu/~mk51/" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div>
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