<p>Simple: it's better when it's faster. Small problems and moderate-size 2D problems often work well with direct solvers.</p>
<div class="gmail_quote">On Oct 30, 2012 8:29 AM, "w_ang_temp" <<a href="mailto:w_ang_temp@163.com">w_ang_temp@163.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="line-height:1.7;font-size:14px;font-family:arial"><div style="line-height:1.7;font-size:14px;font-family:arial">
<div>Hello,</div>
<div> As is know, MUMPS is based on a direct method. When the system is big, the parallel direct solver is </div>
<div>not effective compared with the iterative solver. So when is it better to use MUMPS?</div>
<div> Thanks.</div>
<div> Jim</div></div><br><br><span title="neteasefooter"><span></span></span></div><br><br><span title="neteasefooter"><span></span></span></blockquote></div>