For atoms with two or more electrons, the governing equations can only be solved with the use of methods of iterative approximation.
2.
He has developed a non-iterative approximation to coupled-perturbed Kohn-Sham density functional theoretic equations for calculation of non-linear properties, which is implemented in the developers version of deMon code.
3.
Naive Bayes classifiers are highly scalable, requiring a number of parameters linear in the number of variables ( features / predictors ) in a learning problem . iterative approximation as used for many other types of classifiers.