.txt</a>,
          the weights of the rule.
        </li>
        <li>
          <a href = "../../datasets/quadrature_rules_legendre/leg_o2_r.txt">
          leg_o2_r.txt</a>,
          defines the region for the rule.
        </li>
        <li>
          <a href = "../../datasets/quadrature_rules_legendre/leg_o2_exact.txt">leg_o2_exact.txt</a>,
          the results of the command 
          <blockquote><b>
            legendre_exactness ( 'leg_o2', 5 )
          </b></blockquote>
        </li>
      </ul