---
tag: 0F4WRWBZZC
kind: concept
name: Quadratic integer
msc: [11R11]
sources:
  - url: https://en.wikipedia.org/wiki/Quadratic_integer
    locator: lead section
same_as:
  wikidata: Q803531
  wikipedia: Quadratic integer
---

## Summary

A quadratic integer is a root of a monic quadratic polynomial with integer coefficients, that is, an algebraic integer of degree at most $2$.
The [[definition of a quadratic integer|01VN79T2PR]] gives the precise form.