<div class="gmail_quote">On Tue, Jan 17, 2012 at 06:16, Jed Brown <span dir="ltr"><<a href="mailto:jedbrown@mcs.anl.gov">jedbrown@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">
Not unless you formulate A^T A which doubles the condition number.</blockquote></div><br><div>Jack pointed out my typo, of course this *squares* the condition number (not a good idea unless your coarse level is quite well-conditioned).</div>