| Auxillary class for testing solvers.
The function is extraordinarily well behaved around zero roots: it
has an inflection point there (second order derivative is zero),
which means linear approximation (Regula Falsi) will converge
quadratically.
version: $Revision: 155427 $ $Date: 2005-02-26 06:11:52 -0700 (Sat, 26 Feb 2005) $ |