Dear all,<div><br></div><div>I'm using the C++ interface of Ipopt, and I'm wondering if any of you out there have suggestions for codes that will allow me to do fast sparse matrix additions using the triplet format used in Ipopt. I've seen some codes that use compressed row or column formats, but I'm not using those conventions. For now, I'm trying to not change my code that much. I need this to add the Hessian of the objective function with the Hessian of the constraints, among others. </div>
<div><br></div><div>Any suggestions will be appreciated.</div><div><br></div><div>Thanks,</div><div> Rodrigo<br clear="all"><br>-- <br><span style="font-family:Arial, Helvetica, sans-serif;font-size:14.1667px;border-collapse:collapse;color:rgb(51, 51, 51)"><img src="http://www.cs.cmu.edu/~aml/logos/wordmark.jpg" width="200" height="24"><br>
<strong><span><font color="#000000"><span style="background-color:rgb(255, 255, 255)">Rodrigo</span></font></span><font color="#000000"><span style="background-color:rgb(255, 255, 255)"> López-</span></font><span><font color="#000000"><span style="background-color:rgb(255, 255, 255)">Negrete</span></font></span><font color="#000000"><span style="background-color:rgb(255, 255, 255)"> de la Fuente</span></font></strong><font color="#000000"><span style="background-color:rgb(255, 255, 255)"><br>
</span></font>Doctoral Candidate <br>Email: <a href="mailto:rln@cmu.edu" style="color:rgb(7, 77, 143)" target="_blank"><span>rln@cmu.edu</span></a><div><span style="color:rgb(34, 34, 34)"><span style="background-color:rgb(255, 255, 255)">WWW</span></span><span style="background-color:rgb(255, 255, 255)">: <a href="http://rodrigo.lopez-negrete.org/" target="_blank">http://rodrigo.lopez-negrete.org</a></span><span style="background-color:rgb(255, 255, 255)"><br>
</span><br>Department of Chemical Engineering<br>Carnegie Mellon University <br>5000 Forbes Ave. <br>Pittsburgh, PA 15213-3890<br>USA</div></span><br>
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