---
tag: 07EZA80NEH
kind: concept
name: Signature of a quadratic form
msc: [15A63, "11E04"]
sources:
  - url: https://en.wikipedia.org/wiki/Metric_signature
    locator: Definition
same_as:
  wikidata: Q1142562
  wikipedia: Metric signature
---

## Summary

The signature of a real quadratic form records the numbers of positive, negative and zero coefficients in any diagonal form of it.