---
tag: 099TWVJ909
kind: concept
name: Geometric multiplicity
msc: [15A18]
sources:
  - url: https://en.wikipedia.org/wiki/Eigenvalues_and_eigenvectors
    locator: Eigenspaces, geometric multiplicity, and the eigenbasis
---

## Summary

The geometric multiplicity of an eigenvalue is the dimension of its eigenspace.