L-type ligands are neutral ligands that donate two electrons to the metal center regardless of the electron counting method being used.

The 2006 census counting method included religion, so the number of adherents of the different religions are usually rough estimates made by religious and non-governmental agencies.

These algorithms can be classified under various paradigms such as exact counting methods, sampling methods, pattern growth methods and so on.

Many combinatorial identities arise from double counting methods or the method of distinguished element.

However, it has been well documented that plate counting methods usually miss approximately 99% of the total microbial diversity found in a given environment.