<div class="gmail_quote">Like which part? Lower and upper triangular in some ordering? That's exactly what PCSOR does.</div><div class="gmail_quote"><br></div><div class="gmail_quote">On Fri, Sep 21, 2012 at 5:14 PM, Shao-Ching Huang <span dir="ltr"><<a href="mailto:huangsc@gmail.com" target="_blank">huangsc@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">... and A2 is the rest of the Laplacian.</blockquote></div><br>