---
tag: 0EQWVHF3W5
kind: concept
name: Field extension
msc: [12F05]
sources:
  - url: https://en.wikipedia.org/wiki/Field_extension
    locator: lead section
same_as:
  wikidata: Q577835
  wikipedia: Field extension
---

## Summary

A field extension is a pair of fields $K \subseteq L$, where $K$ is a subfield of $L$.
One writes $L/K$ and says that $L$ is an extension of $K$.
The [[definition of a field extension|0WQ1A8SHTZ]] gives the details.