---
tag: 05AVARPXA2
kind: concept
name: Binary relation
aliases: [relation]
msc: ["03E20"]
sources:
  - url: https://en.wikipedia.org/wiki/Binary_relation
    locator: lead section
same_as:
  wikidata: Q130901
  wikipedia: Binary relation
---

## Summary

A binary relation between two sets says, for each pair of elements, whether the first element is related to the second.
Formally, it is a set of ordered pairs.