Figure 18.40.2 (See in context.)Figure 18.40.2: Derivative Rule inversions for carried out via Lagrange
and PWCF interpolations. Shown are the absolute errors of approximation (18.40.8) at the points
, for . For the derivative rule
Lagrange interpolation (red points) gives
digits in the central region, while PWCF interpolation (blue points) gives .
