Arthur Ulmer

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20182026

most citedErdős-Pósa from ball packing

2 citations · 6 across the 7 of their papers we have counts for

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math.CO2018★ 1 cited

Packing A-Paths of Length Zero Modulo Four

Henning Bruhn, Arthur Ulmer

We show that A-paths of length 0 modulo 4 have the Erdős-Pósa property. We also prove that A-paths of length 2 modulo 4 have the property but that A-paths of length 1 or of length…

math.CO2018★ 1 cited

Directed cycles have the edge-Erd\H os-Pósa property

Matthias Heinlein, Arthur Ulmer

In this short note we prove that for every $k \in N$ there is a $t_{k} \in N$ such that for every digraph $G$ there are either $k$ edge-disjoint directed cycles in $G$ …