---
tag: 00SPJSDT3Z
kind: concept
name: Gram matrix
msc: [15A63, 15B57]
sources:
  - url: https://en.wikipedia.org/wiki/Gram_matrix
    locator: lead section
same_as:
  wikidata: Q1409400
  wikipedia: Gram matrix
---

## Summary

The Gram matrix of a finite family of vectors in an inner product space is the square matrix of all their pairwise inner products.