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math.CO2024
Erdős-Pósa property of tripods in directed graphs
Marcin Briański, Meike Hatzel, Karolina Okrasa +1
Let be a directed graphs with distinguished sets of sources and sinks . A tripod in is a subgraph consisting of the union of two --…
math.CO2024
Half-integral Erdős-Pósa property for non-null - paths
Vera Chekan, Colin Geniet, Meike Hatzel +4
For a group , a -labelled graph is an undirected graph where every orientation of an edge is assigned an element of so that opposite orientations of the same edge are…