Definition from Wiktionary, the free dictionary
- (mathematics) a member of the set of natural numbers
- a positive integer (set of [1, 2, 3, ...])
- 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.
positive integer or non-negative integer
(only) positive integer
(only) non-negative integer