| Definition: A natural number can mean either an element of the set {1, 2, 3, ...} (i.e., the positive integers) or an element of the set {0, 1, 2, 3, ...} (i.e., the non-negative integers). [d] [e]
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| Workgroup category: Mathematics Workgroup [Categories OK]
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| Article status: External article (from another source, with little change)
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| English language variant: Not specified
| Underlinked article?: Yes
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| Talk Archive: none (to start Archive 1)
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