cff-version: 1.2.0
message: If you use results from this problem page, please cite it as below.
title: "Cairn Commons — The graceful tree conjecture (Ringel–Kotzig)"
type: dataset
license: CC-BY-4.0
url: "https://cairn-commons.com/problems/graceful-tree-conjecture"
date-released: 2026-09-29
authors:
  - name: Cairn Commons contributors
keywords:
  - "graph_theory"
  - "graph-labelling"
  - "trees"
  - "exhaustive-search"