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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi Jed,<br>
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Thank you for your quick reply. But as pointed out at http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatMatTransposeMult.html:<br>
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This routine is currently only implemented for pairs of SeqAIJ matrices. C will be of type MATSEQAIJ.<br>
<br>
Therefore I can not use it for dense matrix, am I right? If so, will MatMatTransposeMult be extended for other types of matrix later on? Thank you very much.<br>
<br>
Cheers<br>
<br>
Gao<br>
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<div style="direction: ltr;" id="divRpF965940"><font color="#000000" face="Tahoma" size="2"><b>From:</b> petsc-users-bounces@mcs.anl.gov [petsc-users-bounces@mcs.anl.gov] on behalf of Jed Brown [jedbrown@mcs.anl.gov]<br>
<b>Sent:</b> Thursday, April 05, 2012 2:09 PM<br>
<b>To:</b> PETSc users list<br>
<b>Subject:</b> Re: [petsc-users] question about MatMatMultTranspose<br>
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<div class="gmail_quote">On Thu, Apr 5, 2012 at 04:43, Gao Bin <span dir="ltr"><<a href="mailto:bin.gao@uit.no" target="_blank">bin.gao@uit.no</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div style="direction:ltr; font-size:10pt; font-family:Tahoma">I would like to use PETSc perform matrix-matrix multiplication C=A*B^T. I notice that MatMatMultTranspose could calculate C=A^T*B, but which is not I want.<br>
<br>
Does anyone know how to perform C=A*B^T using PETSc (I know I could first calculate B^T and call MatMatMult with A and B^T, but it might not be efficient, is it?)? Thank you in advance.</div>
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<div>Use petsc-dev. That routine is renamed (<a href="http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatTransposeMatMult.html" target="_blank">http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatTransposeMatMult.html</a>) and the one
you want is</div>
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<div><a href="http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatMatTransposeMult.html" target="_blank">http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatMatTransposeMult.html</a></div>
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