cff-version: 1.2.0
message: If you use results from this problem page, please cite it as below.
title: "Cairn Commons — The Erdős unit distance problem in the plane"
type: dataset
license: CC-BY-4.0
url: "https://cairn-commons.com/problems/erdos-unit-distance"
date-released: 2026-09-29
authors:
  - name: Cairn Commons contributors
keywords:
  - "geometry"
  - "discrete-geometry"
  - "incidence-geometry"
  - "erdos-problems"
  - "algebraic-number-theory"