# Fermat's principle

> principle of least time

**Wikidata**: [Q331041](https://www.wikidata.org/wiki/Q331041)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Fermat's_principle)  
**Source**: https://4ort.xyz/entity/fermat-s-principle


## References

1. Freebase Data Dumps. 2013