OC268" href="maxima_49.html#SEC286">49. ggf</a>
  <ul class="toc">
    <li><a name="TOC269" href="maxima_49.html#SEC287">49.1 Functions and Variables for ggf</a></li>
  </ul></li>
  <li><a name="TOC270" href="maxima_50.html#SEC288">50. graphs</a>
  <ul class="toc">
    <li><a name="TOC271" href="maxima_50.html#SEC289">50.1 Introduction to graphs</a></li>
    <li><a name="TOC272" href="maxima_50.html#SEC290">50.2 Functions and Variables for graphs</a>
    <ul class="toc">
      <li><a name="TOC273" href="max