# Calderón–Zygmund lemma

> Analysis theorem

**Wikidata**: [Q1707076](https://www.wikidata.org/wiki/Q1707076)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Calderón–Zygmund_lemma)  
**Source**: https://4ort.xyz/entity/calder-n-zygmund-lemma