 + eta )
      </pre>
      The parameters ALPHA, BETA, GAMMA and DELTA are strictly positive.
    </p>

    <p>
      The user must input a value H specifying the desired space step
      to be used in discretizing the space dimension.
    </p>

    <p>
      A finite difference scheme is employed to integrate the problem
      from time 0 to a maximum time T.  The user must input the value
      T, as well as an appropriate time step DELT.
    </p>

    <p>
      Typical data for this problem is:
      <p