# dual

> correspondence between properties of a category and its opposite

**Wikidata**: [Q2361385](https://www.wikidata.org/wiki/Q2361385)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Dual_(category_theory))  
**Source**: https://4ort.xyz/entity/dual-q2361385


## References

1. Freebase Data Dumps. 2013