<div class="gmail_quote">On Mon, Apr 2, 2012 at 06:59, Karin&NiKo <span dir="ltr"><<a href="mailto:niko.karin@gmail.com">niko.karin@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=":2p1">I would like to use ML as a preconditioner for a linear elasticity problem.<br>I wonder if there is a way to indicate ML that it is dealing with a vector problem. <br>I know that when using Prometheus, one must use a block matrix, and I would like to know if there is a trick <br>
in order to use ML in an optimal manner for vector problems.</div></blockquote></div><br><div>The block size is used if you don't provide any other information. The preferred approach with petsc-dev is to use MatSetNearNullSpace(). (I'll make sure this is currently working with ML and reply to this message.)</div>