Ore's Theorem for rainbow Hamiltonian-connected graphs
Combinatorics
2025-12-16 v1
Abstract
Let be a collection of graphs on a common vertex set . For a graph with vertices in , we say that contains a rainbow if there is an injection such that for every edge , we have . In this paper, we show that if is a collection of graphs on vertices such that for every , whenever , then either contains rainbow Hamiltonian paths between every pair of vertices, or contains a rainbow Hamiltonian cycle. Moreover, we prove a stronger version in which we may also embed prescribed rainbow linear forests into the Hamiltonian paths.
Cite
@article{arxiv.2512.12143,
title = {Ore's Theorem for rainbow Hamiltonian-connected graphs},
author = {Yupei Li and Ruth Luo},
journal= {arXiv preprint arXiv:2512.12143},
year = {2025}
}