# natural number

> ambiguous mathematical term used either for non-negative or for strictly positive integers, depending on usage

**Wikidata**: [Q21199](https://www.wikidata.org/wiki/Q21199)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Natural_number)  
**Source**: https://4ort.xyz/entity/natural-number


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=60214)
3. [Earliest Known Uses of Some of the Words of Mathematics (N). MacTutor History of Mathematics archive](https://mathshistory.st-andrews.ac.uk/Miller/mathword/n/)
4. [Natural Number. CRC Concise Encyclopedia of Mathematics. 1999](https://archive.lib.msu.edu/crcmath/math/math/n/n035.htm)
5. ISO 80000-2:2019 Quantities and units — Part 2: Mathematics
6. Nuovo soggettario
7. Freebase Data Dumps. 2013
8. Integrated Authority File
9. YSO-Wikidata mapping project
10. BabelNet
11. National Library of Israel
12. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
13. [自然数 (しぜんすう)とは【ピクシブ百科事典】](https://dic.pixiv.net/a/%E8%87%AA%E7%84%B6%E6%95%B0)