<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Apr 2, 2014 at 8:23 AM, Xiangdong <span dir="ltr"><<a href="mailto:epscodes@gmail.com" target="_blank">epscodes@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 dir="ltr">Hello everyone,<div><br></div><div>I have two quick questions about src/snes/examples/tutorials/ex3.c.</div>
<div><br></div><div>1) In line 150-151, why do we need to call MatSeqAIJSetPreallocation before MatMPIAIJSetPreallocation? I found that without the seqaij call, the program crashed. However, the mat J we want to create is the mpiaij.</div>
<div><br></div><div>2) In line 390-397, it sets the values of the residue function at the boundary. Where do these values come from? In other words, I am not clear about ff[0]=xx[0] and ff[xs+xm-1] = xx[xs+xm-1] - 1.0;</div>
</div></blockquote><div><br></div><div>These are just the BC we choose.</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div>Thank you.</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Xiangdong</div></font></span></div>
</blockquote></div><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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