---
tag: 0XC1RDBY7A
kind: concept
name: Trace of a matrix
msc: [15A15]
sources:
  - url: https://en.wikipedia.org/wiki/Trace_(linear_algebra)
    locator: Definition
same_as:
  wikidata: Q321102
  wikipedia: Trace (linear algebra)
---

## Summary

The trace of a square matrix is the sum of the entries on its main diagonal.