# Hartle–Hawking state

> proposal concerning the state of the Universe prior to the Planck epoch, given by the path integral over all geometries that have a specified induced metric on their boundary

**Wikidata**: [Q958793](https://www.wikidata.org/wiki/Q958793)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hartle–Hawking_proposal)  
**Source**: https://4ort.xyz/entity/hartle-hawking-state


## References

1. Freebase Data Dumps. 2013