<div class="gmail_quote">On Sun, May 15, 2011 at 18:41, Barry Smith <span dir="ltr"><<a href="mailto:bsmith@mcs.anl.gov">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;">
This may help a bit but I'm not sure how dramatically. What we could really use is a point block ILU for AIJ matrices with inodes. That is each inode set of rows is eliminated simultaneously (by factoring the little diagonal block associated with that inode). </blockquote>
<div><br></div><div>But, pivoting aside, what is the difference between point and point-block ILU when there is no discarded fill within the block?</div></div>