# closed timelike curve

> worldline (timelike curve) in a Lorentzian manifold that is closed (returns to its starting point)

**Wikidata**: [Q1876815](https://www.wikidata.org/wiki/Q1876815)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Closed_timelike_curve)  
**Source**: https://4ort.xyz/entity/closed-timelike-curve


## References

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