# Furry's theorem

> theorem in quantum physics that, in a theory preserving charge conjugation symmetry, a Feynman diagram consisting of a closed fermion loop connected to an odd number of vertices integrates to zero

**Wikidata**: [Q26877569](https://www.wikidata.org/wiki/Q26877569)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Furry's_theorem)  
**Source**: https://4ort.xyz/entity/furry-s-theorem