<div class="gmail_quote">On Fri, Jun 10, 2011 at 00:47, 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;">
<div id=":2fd">So you are suggesting totally removing PCFieldSplitSetSchurPrecondition() and instead having the user call MatSetApproximateSchurComplement() if they wish to provide a matrix? </div></blockquote></div><br><div>
Yeah, though I think it would still be useful to fall back to using the diagonal block if nothing was provided by the user. The user can choose -pc_type none if they don't want to do anything with that block.</div>