# Kramers–Kronig relations

> relations connecting the real and imaginary parts of any complex function that is analytic in the upper half-plane

**Wikidata**: [Q1424764](https://www.wikidata.org/wiki/Q1424764)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Kramers–Kronig_relations)  
**Source**: https://4ort.xyz/entity/kramers-kronig-relations


## References

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