N
المؤلف:
Sloane, N. J. A.
المصدر:
Sequence A000027/M0472 in "The On-Line Encyclopedia of Integer Sequences."
الجزء والصفحة:
...
22-7-2020
1320
N
The set of natural numbers (the positive integers Z-+ 1, 2, 3, ...; OEIS A000027), denoted 
, also called the whole numbers. Like whole numbers, there is no general agreement on whether 0 should be included in the list of natural numbers.
Due to lack of standard terminology, the following terms are recommended in preference to "counting number," "natural number," and "whole number."
| set |
name |
symbol |
...,  ,  , 0, 1, 2, ... |
integers |
Z |
| 1, 2, 3, 4, ... |
positive integers |
Z-+ |
| 0, 1, 2, 3, 4, ... |
nonnegative integers |
Z-* |
0,  ,  ,  ,  , ... |
nonpositive integers |
|
 ,  ,  ,  , ... |
negative integers |
Z-- |
REFERENCES:
Sloane, N. J. A. Sequence A000027/M0472 in "The On-Line Encyclopedia of Integer Sequences."
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