issas of the rule.
        </li>
        <li>
          <a href = "../../datasets/quadrature_rules_legendre/leg_o1_w.txt">
          leg_o1_w.txt</a>,
          the weights of the rule.
        </li>
        <li>
          <a href = "../../datasets/quadrature_rules_legendre/leg_o1_r.txt">
          leg_o1_r.txt</a>,
          defines the region for the rule.
        </li>
        <li>
          <a href = "../../datasets/quadrature_rules_legendre/leg_o1_exact.txt">leg_o1_exact.txt</a>,
          the results 