---
tag: 0FWBQ53MPJ
kind: concept
name: Choice function
aliases: [selector]
msc: ["03E25"]
sources:
  - url: https://en.wikipedia.org/wiki/Choice_function
    locator: lead section
same_as:
  wikidata: Q2513496
  wikipedia: Choice function
---

## Summary

A choice function on a collection of nonempty sets picks one element from each set.