// The following member is in the 
//    Fraction class first described in Chapter 3
//    to override equals inherited from Object
//    This makes find and remove in the arbitratry list work


    public boolean equals(Object y)   // override
    {   return ( y == this ||
		 (this.getClass() == y.getClass()
	          && num == ((Fraction)y).num
		  && denom == ((Fraction)y).denom )
               );
    }