English

Distinguishing infinite star-free graphs

Combinatorics 2021-05-25 v2

Abstract

Call a colouring of a graph \emph{distinguishing} if the only automorphism of this graph which preserves said colouring is the identity. Let HH be an arbitrary graph. We say that a graph GG is \emph{HH-free} if GG does not contain an induced subgraph isomorphic to HH. Kargul, Musia{\l}, Pal and Gorzkowska showed that if nn is a natural number greater than two, then every finite connected K1,nK_{1,n}-free graph of order at least six admits a distinguishing edge colouring with at most n1n-1 colours. We extend this result to all locally finite connected K1,nK_{1,n}-free graphs of order at least six.

Keywords

Cite

@article{arxiv.2102.00779,
  title  = {Distinguishing infinite star-free graphs},
  author = {Marcin Stawiski},
  journal= {arXiv preprint arXiv:2102.00779},
  year   = {2021}
}
R2 v1 2026-06-23T22:43:11.046Z