---
tag: 09CEDJYBKP
kind: concept
name: Cartesian product
aliases: [product-of-sets, cross-product-of-sets]
msc: ["03E20"]
sources:
  - url: https://en.wikipedia.org/wiki/Cartesian_product
    locator: lead section
same_as:
  wikidata: Q173740
  wikipedia: Cartesian product
---

## Summary

The Cartesian product of two sets is a set of ordered pairs.
The first entry of each pair is in the first set, and the second entry is in the second set.
Each such pair is in the product.