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

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

layer 4 · definition · cluster 关系与函数 (`set.rel`) · Set Theory
names: `binary relation` (short) · `Relation` (full)

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


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