# 环 → σ-环 的判据　`thm.ring-monotone-sigma`
English entry · root `../`
[in graph](../#n=thm.ring-monotone-sigma)　·　[Chinese page (authoritative)](./thm.ring-monotone-sigma.md)

> English: **draft** · machine-drafted, pending author review; the Chinese page is authoritative.

layer 5 · theorem · cluster 集合族与 σ-代数 (`analysis.setclass`) · Analysis

> 续见 nodes/thm.ring-monotone-sigma.en.2.md