Geelen's coarse Gallai conjecture for A-paths
Geelen's coarse Gallai conjecture for A-paths
Let be a finite or infinite graph and let . An -path is a path in between two distinct vertices of . Two subgraphs are at distance at least when the distance between their vertex sets is at least . A set is -centered if it is contained in the union of at most balls of radius at most . Geelen's coarse Gallai conjecture. There exist functions such that for any , graph and , either there exist -paths pairwise at distance in at least , or there exists a set -centered in intersecting all -paths. The conjecture is a coarse version of Gallai's packing-covering theorem for -paths. The source does not state a resolution; its exact original formulation was reported as lost, and this is the formulation attributed to Geelen by Hendrey and Jacobs.
Sources & referencesView supporting material
Primary source
Chun-Hung Liu, “Coarse Menger property of quasi-minor excluded graphs and length spaces”, arXiv:2605.10068 (2026).
Additional references
2 papers in this index state this conjecture (2025–2026). The statement above is taken from the most recent of them; the others are arXiv:2512.17232.
Progress summary
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