<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Feb 10, 2016 at 8:06 AM, wen zhao <span dir="ltr"><<a href="mailto:wen.zhao@outlook.fr" target="_blank">wen.zhao@outlook.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div dir="ltr">Hello<br><br>I have another question about the multiplication of two vector with the form<br><br>(x) * (x^T), which x is of length n, <br><br>That means, the result is a matrix. Is there some functions in Petsc.<br></div></div></blockquote><div><br></div><div>You do not want to form this matrix since it is dense but very low rank. We do not have</div><div>a separate abstraction for outer product matrices, but it would not be hard to write. However,</div><div>its not clear it would save people much programming, and it increases the interface size.</div><div><br></div><div> Thanks,</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><div dir="ltr">Thanks</div></div></blockquote></div>-- <br><div class="gmail_signature">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</div>
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