ube.  Some 
      integrands include one or more parameters.  These generally have
      default values, which can be altered by the user.
    </p>

    <p>
      For each problem, a set of routines are available with a standard
      interface, for manipulating and evaluating the problem.  For a
      problem with index "87", for instance, we might have the following
      set of routines.  The most important is <b>P87_F</b> which evaluates
      the integrand.  We probably also need <b>P87_LIM</b> to dete