# Borel *σ*-algebra

## Contents

## EnglishEdit

### EtymologyEdit

Named after French mathematician Émile Borel (1871–1956), who pioneered measure theory.

### NounEdit

**Borel σ-algebra** (

*plural*

**Borel σ-algebras**)

- (analysis) The smallest
*σ*-algebra which contains the topology of a given topological space.