# Borel　`def.borel`
English entry · root `../`
[in graph](../#n=def.borel)　·　[Chinese page (authoritative)](./def.borel.md)

> English: **name only** · auto-derived from the source data; the Chinese page is authoritative.

layer 6 · definition · cluster 集合族与 σ-代数 (`analysis.setclass`) · Analysis / Topology

## Statement and proof
Chinese only — see the Chinese page `nodes/def.borel.md` and `proofs/`.


Cite: `def.borel` (content v0.9.0) · terms: [LICENSE.txt](../LICENSE.txt)