---
tag: 07PH4RX0X5
kind: concept
name: Jordan block
msc: [15A21]
sources:
  - url: https://en.wikipedia.org/wiki/Jordan_matrix
    locator: Definition
---

## Summary

A Jordan block is a square matrix with one scalar $\lambda$ on the diagonal, $1$ on the diagonal just above it, and $0$ elsewhere.