natural number

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natural number ‎(plural natural numbers)

  1. (mathematics) a member of the set of natural numbers
    1. a positive integer (set of [1, 2, 3, ...])
    2. a non-negative integer (set of [0, 1, 2, 3, ...]).
      • 2007, Mark Bridger, REAL ANALYSIS: A Constructive Approach, Hoboken, New Jersey: John Wiley & Sons, page 3:
        A careful derivation of the arithmetic properties of the natural numbers , using induction, was done by G. Peano (1858–1932). It is a lot of fun, but we will not pursue any of it here.


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