Recall from Chapter 10 that **EXP** raises e to the argument given. Thus, the larger value is, the smaller the initial value of will be. But that initial value will then be adjusted upward slightly for each degree of freedom as long as m is greater than the number of degrees of freedom. Since the value returned by inverse-chi-square is supposed to be another probability, it’s important to clamp the value returned with **MIN** since rounding errors in the multiplication and exponentiation may cause the **LOOP** to return a sum just a shade over 1.