values of the Wigner 6J function.
        </li>
        <li>
          <b>SOUND_VALUES</b> returns some values of the speed of sound.
        </li>
        <li>
          <b>SPHERE_UNIT_AREA_VALUES</b> returns some areas of the unit sphere in ND.
        </li>
        <li>
          <b>SPHERE_UNIT_VOLUME_VALUES</b> returns some volumes of the unit sphere in ND.
        </li>
        <li>
          <b>SPHERICAL_HARMONIC_VALUES</b> returns values of spherical harmonic functions.
        </li>
        <li>
   