<div class="gmail_quote">On Thu, Jan 6, 2011 at 04:01, Gianluca Meneghello <span dir="ltr"><<a href="mailto:gianmail@gmail.com">gianmail@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div id=":3ad">When using ASM with<br>
different subdomains on the same process, is the order in which the<br>
domains are solved the same as the one in which they are stored in the<br>
IS array passed to PCASMSetLocalSubdomains()? I would be interested in<br>
controlling this in order to build a downstream marching smoother.</div></blockquote></div><br><div>PCASM is "Additive" rather than multiplicative so there is no order. PCFieldSplit includes multiplicative and symmetric-multiplicative variants, but each subdomain ("split" in this context) is global which exposes less concurrency (subdomains can be empty on some processes so this only affects performance, not which Schwarz-like algorithms are implementable).</div>