Separating the edges of a graph by a linear number of paths
Advances in Combinatorics (2023)
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Recently, Letzter proved that any graph of order $n$ contains a collection $\mathcal{P}$ of $O(n\log^\star n)$ paths with the following property: for all distinct edges $e$ and $f$ there exists a path in $\mathcal{P}$ which contains $e$ but not $f$. We improve this upper bound to $19 n$, thus answering a question of G.O.H. Katona and confirming a conjecture independently posed by Balogh, Csaba, Martin, and Pluhár and by Falgas-Ravry, Kittipassorn, Korándi, Letzter, and Narayanan. Our proof is elementary and self-contained.
@article{ADVC_2023_a1,
author = {Marthe Bonamy and F\'abio Botler and Fran\c{c}ois Dross and T\'assio Naia and Jozef Skokan},
title = {Separating the edges of a graph by a linear number of paths},
journal = {Advances in Combinatorics},
year = {2023},
language = {en},
url = {http://geodesic.mathdoc.fr/item/ADVC_2023_a1/}
}
Marthe Bonamy; Fábio Botler; François Dross; Tássio Naia; Jozef Skokan. Separating the edges of a graph by a linear number of paths. Advances in Combinatorics (2023). http://geodesic.mathdoc.fr/item/ADVC_2023_a1/