eturns a title for a problem specified by index.
        </li>
        <li>
          <a href = "p01_ab.m">p01_ab.m</a>, 
          returns bounds for problem 1.
        </li>
        <li>
          <a href = "p01_f.m">p01_f.m</a>, 
          returns the objective function value for problem 1.
        </li>
        <li>
          <a href = "p01_m.m">p01_m.m</a>, 
          returns the spatial dimension for problem 1.
        </li>
        <li>
          <a href = "p01_sol.m">p01_sol.m</a>, 
          return