ogram that
      constructs the triangulation.  However, in the simplest case,
      the user might construct a very crude triangulation by hand, and
      have <a href = "../../m_src/triangulation_refine/triangulation_refine.html">
      TRIANGULATION_REFINE</a> refine it to something more reasonable.
    </p>

    <p>
      For the following ridiculously small example:
      <pre>
       10-11-12
        |\   |\
        | \  | \
        6  7 8  9
        |   \|   \
        1-2--3--4-5
      </pre>
      t