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C-number

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This is an old revision of this page, as edited by 132.239.145.146 (talk) at 00:50, 14 October 2010 (Changed the phrasing to make the definition of a c-number more clear.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
For the use of C-numbers for the classification of Corydoras species, see Corydoras.

The term c-number (or classical number) is an old nomenclature used by Paul Dirac, and it refers to real and complex numbers. It is used to distinguish from operators (q-numbers or quantum numbers) in quantum mechanics.

Although c-numbers are commuting, in physics the term anti-commuting c-number is used to refer to a type of anti-commuting numbers that are mathematically described by Grassmann numbers.

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