# Ward–Takahashi identity

> identity in abelian gauge theories due to gauge invariance

**Wikidata**: [Q353202](https://www.wikidata.org/wiki/Q353202)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ward–Takahashi_identity)  
**Source**: https://4ort.xyz/entity/ward-takahashi-identity


## References

1. Freebase Data Dumps. 2013