---
tag: 00BE2J8H05
kind: concept
name: One-sided limit
msc: [26A03]
sources:
  - url: https://en.wikipedia.org/wiki/One-sided_limit
    locator: lead section
same_as:
  wikidata: Q2633817
  wikipedia: One-sided limit
---

## Summary

A one-sided limit is the limit of a function as the argument approaches a point from the left only or from the right only. A function has a limit at a point exactly when both one-sided limits exist and agree. The node [[one-sided limit|0909PWZR62]] gives the precise definition.