       <li>
          <b>BANJAC</b> estimates a banded jacobian matrix.
        </li>
        <li>
          <b>BANSLV</b> solves a banded linear system.
        </li>
        <li>
          <b>CHECKW</b> checks the input arrays on the first call.
        </li>
        <li>
          <b>COQUAL</b> computes the "correction quality".
        </li>
        <li>
          <b>CORECT</b> applies a correction method to an approximate solution of the system.
        </li>
        <li>
          <b>DENJAC</b> estima