he boundary edges into one or more
      connected components, and writes a file describing the components
      and the sequence of boundary edges.
    </p>

    <p>
      Either a 3-node or 6-node triangulation may be used.
    </p>

    <h3 align = "center">
      Usage:
    </h3>

    <p>
      <blockquote>
        <b>triangulation_boundary_edges</b> ( <i>'prefix'</i> )
      </blockquote>
      where <i>prefix</i> is the common filename prefix:
      <ul>
        <li>
          <i>prefix</i><b>_nodes.t