# Pontryagin-van Kampen　`thm.pontryagin-van-kampen`
English entry · root `../`
[in graph](../#n=thm.pontryagin-van-kampen)　·　[Chinese page (authoritative)](./thm.pontryagin-van-kampen.md)

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

layer 18 · theorem · cluster 拓扑阿贝尔群 (`cond.topo`) · Condensed Mathematics / Topology

## Statement and proof
Chinese only — see the Chinese page `nodes/thm.pontryagin-van-kampen.md` and `proofs/`.


Cite: `thm.pontryagin-van-kampen` (content v0.9.0) · terms: [LICENSE.txt](../LICENSE.txt)