---
tag: 061J5VGSPT
kind: concept
name: Symmetric relation
aliases: [symmetry-of-a-relation]
msc: ["03E20"]
sources:
  - url: https://en.wikipedia.org/wiki/Symmetric_relation
    locator: lead section
same_as:
  wikidata: Q621461
  wikipedia: Symmetric relation
---

## Summary

A relation is symmetric when it always holds in both directions.