“…[Stankovic et al 1998] compared two algebras for 2 and 3-variable functions for a sample size of 20,000 and [Adams et al 2002] compared five algebras using sample sizes of 20,000 2-variable functions. In [Adams et al 2003], we compared six algebras with functions of up to 5 variables with a sample size of 1,000, and found evidence that the optimisation procedures deliver less and less reduction in the number of non-zero terms, and that the bases perform similarly and converge in performance, as the number of variables increases.…”