Instead of using c as a variable, we measure the distance from the accumulation point -2.
Moreover, we magnify the scale by an amount rn depending on n.
That is, we use as our distance measure e, where
c = -2 + e/rn.
In terms of the distance e, we are interested in the zeros of the functions
gn(e) = fn(-2 + e/rn).
Once we find the appropriate scaling factor rn, we hope to show
Return to Hurwitz-Robucci scaling.