Irregular subgraph in a regular graph
Combinatorics
2026-07-07 v1
Abstract
A conjecture of Alon and Wei states that, for any -regular graph with vertices, there exists a spanning subgraph such that for all , we have , the number of vertices in with degree , is between and . We prove the conjecture for all fixed when is sufficiently large. More precisely, if satisfies then there is a spanning subgraph such that
Cite
@article{arxiv.2607.06465,
title = {Irregular subgraph in a regular graph},
author = {Tianyue Cao and Quanyu Tang and Hehui Wu},
journal= {arXiv preprint arXiv:2607.06465},
year = {2026}
}
Comments
18 pages. Comments and suggestions are welcome