On Tue, Oct 25, 2011 at 10:06 PM, Jed Brown <span dir="ltr"><<a href="mailto:jedbrown@mcs.anl.gov">jedbrown@mcs.anl.gov</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="gmail_quote">On Tue, Oct 25, 2011 at 16:39, Barry Smith <span dir="ltr"><<a href="mailto:bsmith@mcs.anl.gov" target="_blank">bsmith@mcs.anl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> Chebychev?<br></div></blockquote><div><br></div><div>Once I learned how to configure it, I quite like Chebychev for symmetric problems (and it is a natural fit for newer hardware).</div><div><br></div><div>
I don't know a good default for non-symmetric. Playing with ex50 (increasing lid velocity and such), Chebychev with -mg_levels_ksp_chebychev_estimate_eigenvalues 0,.1,0,1.1 seems like not a bad default.</div></div>
</blockquote></div><br>I am for that in dev and we can see if there are spectacular failures.<div><br></div><div> Matt<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<br>
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