---
tag: 0PDVQEP0ZC
kind: concept
name: Matrix–vector product
msc: [15A99]
sources:
  - url: https://en.wikipedia.org/wiki/Matrix_multiplication
    locator: lead section
---

## Summary

The product of an $m \times n$ matrix and a column vector with $n$ entries is a column vector with $m$ entries.
Its entry $i$ is the dot product of row $i$ of the matrix with the vector.