---
tag: 0JAEHXTVV5
kind: concept
name: Riemann sum
msc: [26A42]
sources:
  - url: https://en.wikipedia.org/wiki/Riemann_sum
    locator: lead section
same_as:
  wikidata: Q1156903
  wikipedia: Riemann sum
---

## Summary

A Riemann sum approximates an integral by a finite sum of areas of rectangles. Each rectangle uses the value of the function at a chosen point of a subinterval. The node [[Riemann sum|0HBY48G8G1]] gives the precise definition.