2011/10/31 Gong Ding <span dir="ltr"><<a href="mailto:gdiso@ustc.edu">gdiso@ustc.edu</a>></span><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi,<br>
I have several materials, each has different dofs.<br>
It is a block matrix with nonuniform block size.<br>
However, I know it is impossible to set different block size within a BAIJ matrix -- sigh.<br>
I can only use AIJ matrix here.<br>
My question is let a ILU preconditioner of AIJ matrix do block factorization?<br>
<br>
I guess the block ILU can be<br>
1) more efficient since it is cache friendly.<br>
2) more accurate since it has a "matched" structure.<br>
<br>
Or any suggestion?</blockquote><div><br></div><div>I do not believe any sparse factorization package handles varying block size.</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;">
<font color="#888888"><br>
Gong Ding</font></blockquote></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<br>