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    <div class="moz-cite-prefix">I do not know if this will help, but I
      have written an alternative derivative testing routine as part of
      a particular application of ipopt.  Perhaps the ideas in that
      routine would be helpful.<br>
      <br>
      The documentation can be found at<br>
         
<a class="moz-txt-link-freetext" href="http://moby.ihme.washington.edu/bradbell/cppad_mixed/ipopt_fixed_check_grad_f.htm">http://moby.ihme.washington.edu/bradbell/cppad_mixed/ipopt_fixed_check_grad_f.htm</a><br>
      <br>
      The source code can be found at<br>
         
      <a class="moz-txt-link-freetext" href="https://github.com/bradbell/cppad_mixed/blob/master/src/ipopt_fixed.cpp">https://github.com/bradbell/cppad_mixed/blob/master/src/ipopt_fixed.cpp</a><br>
      in the routine<br>
          <span class="pl-k">bool</span> <span class="pl-en">ipopt_fixed::check_grad_f</span>(<span
        class="pl-k">bool</span> trace, <span class="pl-k">double</span>
      relative_tol)<br>
      <br>
      <br>
      On 3/16/2016 9:00 AM, <a class="moz-txt-link-abbreviated" href="mailto:ipopt-request@coin-or.org">ipopt-request@coin-or.org</a> wrote:<br>
    </div>
    <blockquote
      cite="mid:mailman.4.1458144002.24726.ipopt@list.coin-or.org"
      type="cite">
      <pre wrap="">Send Ipopt mailing list submissions to
        <a class="moz-txt-link-abbreviated" href="mailto:ipopt@list.coin-or.org">ipopt@list.coin-or.org</a>

To subscribe or unsubscribe via the World Wide Web, visit
        <a class="moz-txt-link-freetext" href="http://list.coin-or.org/mailman/listinfo/ipopt">http://list.coin-or.org/mailman/listinfo/ipopt</a>
or, via email, send a message with subject or body 'help' to
        <a class="moz-txt-link-abbreviated" href="mailto:ipopt-request@list.coin-or.org">ipopt-request@list.coin-or.org</a>

You can reach the person managing the list at
        <a class="moz-txt-link-abbreviated" href="mailto:ipopt-owner@list.coin-or.org">ipopt-owner@list.coin-or.org</a>

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Ipopt digest..."
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      <br>
      <pre wrap="">Today's Topics:

   1. Re: Derivative checker seems to be incorrect (Ross Miller)
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      <br>
      <pre wrap="">_______________________________________________
Ipopt mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Ipopt@list.coin-or.org">Ipopt@list.coin-or.org</a>
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