English

Cop-width, flip-width and strong colouring numbers

Combinatorics 2025-05-14 v3

Abstract

Cop-width and flip-width are new families of graph parameters introduced by Toru\'nczyk (2023) that generalise treewidth, degeneracy, generalised colouring numbers, clique-width and twin-width. In this paper, we bound the cop-width and flip-width of a graph by its strong colouring numbers. In particular, we show that for every rNr\in \mathbb{N}, every graph GG has copwidthr(G)scol4r(G)\text{copwidth}_r(G)\leq \text{scol}_{4r}(G). This implies that every class of graphs with linear strong colouring numbers has linear cop-width and linear flip-width. We use this result to deduce improved bounds for cop-width and flip-width for various sparse graph classes.

Keywords

Cite

@article{arxiv.2309.05874,
  title  = {Cop-width, flip-width and strong colouring numbers},
  author = {Robert Hickingbotham},
  journal= {arXiv preprint arXiv:2309.05874},
  year   = {2025}
}
R2 v1 2026-06-28T12:18:43.154Z