# singleton

> set with exactly one element

**Wikidata**: [Q1165112](https://www.wikidata.org/wiki/Q1165112)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Singleton_(mathematics))  
**Source**: https://4ort.xyz/entity/singleton-q1165112


## References

1. Freebase Data Dumps. 2013
2. BabelNet
3. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)