On Thu, Apr 16, 2009 at 10:22 AM, Yixun Liu <span dir="ltr"><<a href="mailto:enjoywm@cs.wm.edu">enjoywm@cs.wm.edu</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
For Ax=b, A is mxn, m>n. I use CG to resolve it and find the solution<br>
makes no sense. I guess rank(A) < min(m,n). How to resolve this<br>
singular system? Use SVD?</blockquote><div><br>CG is a method for SPD matrices. This matrix is not symmetric. You appear<br>to be solving a least squares problem. I would read about these a little. Ake<br>Bjorck has a pretty good book.<br>
<br> Matt<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Best,<br>
<font color="#888888"><br>
Yixun<br>
</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>