C-number
Sign in to saveThe term c-number (classical number) is an old nomenclature introduced by Paul Dirac which refers to real and complex numbers. It is used to distinguish from operators (q-numbers or quantum numbers) in quantum mechanics.
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Within Vinony's link graph, C-number is referenced by 14 other articles, and connects out to quantum mechanics, International Standard Book Number and complex number.
It sits within the topics Numbers and Quantum mechanics.
Its subject is documented across 5 Wikipedia language editions.
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The term c-number (classical number) is an old nomenclature introduced by Paul Dirac which 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, the term anti-commuting c-number is also used to refer to a type of anti-commuting numbers that are mathematically described by Grassmann numbers. The term is also used to refer solely to "commuting numbers" in at least one major textbook.
Excerpted from Wikipedia’s “C-number” article, available under the CC BY-SA 4.0 licence.