_01</b> returns a unit pseudorandom C4VEC.
        </li>
        <li>
          <b>C4VEC_UNITY</b> returns the N roots of unity.
        </li>
        <li>
          <b>CARTESIAN_TO_C4</b> converts a Cartesian form to a C4.
        </li>
        <li>
          <b>POLAR_TO_C4</b> converts a polar form to a C4.
        </li>
        <li>
          <b>R8_UNIFORM_01</b> returns a unit pseudorandom R8.
        </li>
        <li>
          <b>SORT_HEAP_EXTERNAL</b> externally sorts a list of items into ascending 