# Function　`def.number-function`
English entry · root `../`
[in graph](../#n=def.number-function)　·　[Chinese page (authoritative)](./def.number-function.md)

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

layer 13 · definition · cluster 关系与函数 (`set.rel`) · Set Theory / Analysis
names: `function` (short) · `Function` (full)

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


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