English

Separating path systems in complete graphs

Combinatorics 2023-12-25 v1

Abstract

We prove that in any nn-vertex complete graph there is a collection P\mathcal{P} of (1+o(1))n(1 + o(1))n paths that strongly separates any pair of distinct edges e,fe, f, meaning that there is a path in P\mathcal{P} which contains ee but not ff. Furthermore, for certain classes of nn-vertex αn\alpha n-regular graphs we find a collection of (3α+11+o(1))n(\sqrt{3 \alpha + 1} - 1 + o(1))n paths that strongly separates any pair of edges. Both results are best-possible up to the o(1)o(1) term.

Keywords

Cite

@article{arxiv.2312.14879,
  title  = {Separating path systems in complete graphs},
  author = {Cristina G. Fernandes and Guilherme Oliveira Mota and Nicolás Sanhueza-Matamala},
  journal= {arXiv preprint arXiv:2312.14879},
  year   = {2023}
}