---
tag: 0B0KR7FH2Q
kind: concept
name: Equinumerous sets
aliases: [equipotent, equinumerosity, same-cardinality]
msc: ["03E10"]
sources:
  - url: https://en.wikipedia.org/wiki/Cardinality
    locator: Equinumerosity
---

## Summary

Two sets are equinumerous when there is a bijection between them.
Equinumerous sets have the same size, also when they are infinite.