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Canonical is the adjective for canon, literally a 'rule', and has come to mean also 'standard', 'archetypal', 'typical', or 'unique distinguished exemplar'.

See the page canon (disambiguation) for most uses of 'canonical' in law, canon law, religion, literature, etc.

Canonical may refer to:


In mathematics, canonical example is frequently used to mean "archetype, standard example". Canonical also means "distinguished representative of a class", particularly one that does not require making any choice; this is also known as "natural", as in natural transformation. In geometry "tautological" is sometimes used as an alternative, to avoid confusion with other uses of "canonical". Specific uses of canonical include:

In differential geometry:


Computer science[edit]


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