---
tag: 0PYSR20HGF
kind: concept
name: Composition of relations
aliases: [relational-composition]
msc: ["03E20"]
sources:
  - url: https://en.wikipedia.org/wiki/Composition_of_relations
    locator: lead section
same_as:
  wikidata: Q2795123
  wikipedia: Composition of relations
---

## Summary

The composition of two relations relates $a$ to $c$ when there is an intermediate element $b$.
The first relation relates $a$ to $b$, and the second relation relates $b$ to $c$.