<div class="gmail_quote">On Fri, Feb 10, 2012 at 15:50, Dmitry Karpeev <span dir="ltr"><<a href="mailto:karpeev@mcs.anl.gov">karpeev@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">
Why not simply allow DM to return two matrices as SNES and KSP would want anyway? </blockquote></div><br><div>How do you specify the reduced stencil to use for the preconditioning matrix? Maybe it wouldn't add too many more if statements to the current code which is already polluted with them.</div>