---
tag: 0HYFWKKY3C
kind: concept
name: Polar form of a quadratic form
msc: [15A63, "11E04"]
sources:
  - url: https://en.wikipedia.org/wiki/Polarization_of_an_algebraic_form
    locator: Examples
---

## Summary

The polar form of a quadratic form $Q$ is the symmetric bilinear form $B(u, v) = Q(u + v) - Q(u) - Q(v)$.