A general formula such as 20-20-20 suits most of the plant needs.

This general formula holds for even and odd p 1.

The general formula follows if we multiply through by a.

In these cases, the expectation value is determined only by the more general formula (6).

A more general formula for this is given by the degree of coherence.

The general formula must be used for any of the six situations identified in s. 42.

This is a very general formula, which leads to several important special cases given below.

Derivations of the general formula are given later in the article.

For example, to find the representation of 6i, it is possible to use the general formula.

This more general formula can be used in dimensions other than two.