<div dir="ltr"><div>Thanks Matthew !, It sound very interesting I going to check it.<br><br></div>Regard Alex...<br><div><br><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/1/31 Matthew Knepley <span dir="ltr"><<a href="mailto:knepley@gmail.com" target="_blank">knepley@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="im">On Thu, Jan 31, 2013 at 11:07 AM, Jed Brown <span dir="ltr"><<a href="mailto:jedbrown@mcs.anl.gov" target="_blank">jedbrown@mcs.anl.gov</a>></span> wrote:<br>
</div><div class="gmail_extra"><div class="gmail_quote"><div class="im">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div>"result is incorrect" is not helpful. Please include diagnostics. Are you using an iterative or direct solver? Start here if you don't know what to check:</div>
<br><a href="http://scicomp.stackexchange.com/questions/513/why-is-my-iterative-linear-solver-not-converging" target="_blank">http://scicomp.stackexchange.com/questions/513/why-is-my-iterative-linear-solver-not-converging</a></div>
</blockquote><div><br></div></div><div>And ASM works great for these problems:</div><div><br></div><div> <a href="http://arxiv.org/abs/0909.5413" target="_blank">http://arxiv.org/abs/0909.5413</a></div><div><br></div>
<div> Matt</div><div class="im"><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">
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<div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 31, 2013 at 9:58 AM, Alex Salazar <span dir="ltr"><<a href="mailto:alejandrocof@gmail.com" target="_blank">alejandrocof@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">Hello, everyone <br><br>I want to get the solution of algrebraic system (with a dense zero-diagonal simetric matrix) of a interpolation problem (using radial basis functions) with Petsc.<br>
<br> For a few points (around 10 elements) using KSP I get the correct solution, however when I increase the number of points, the result is incorrect.<br>
<br>Any Idea ?<br><br>Regards Alejandro. <br><br></div>
</blockquote></div><br></div></div></div></div>
</blockquote></div></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener
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