On Thu, Jul 19, 2012 at 3:44 AM, Umut Tabak <span dir="ltr"><<a href="mailto:u.tabak@tudelft.nl" target="_blank">u.tabak@tudelft.nl</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear all,<br>
<br>
After some projection operations, I am ending up with a dense generalized non-symmetric eigenvalue problem, such as<br>
<br>
A\phi = \lambda B\phi<br>
<br>
where A and B are given as<br>
<br>
[A11 A12]<br>
[ 0 A22]<br>
<br>
[B11 0 ]<br>
[B21 B22]<br>
<br>
So there are two large 0 blocks in A and B. Moreover, B21 = -A12^T, I was wondering if I can tailor some efficient solver for these matrices with large zero blocks?<br>
<br>
Any ideas and pointers are appreciated highly.<br></blockquote><div><br></div><div>You can try using MatNest for the two matrices, and MatTranspose for B21.</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">
Best regards,<br>
Umut<br>
<br>
</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<br>