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arxiv: 1809.11038 · v1 · pith:ZQYPD6VAnew · submitted 2018-09-28 · 🧮 math.CO

The edge-ErdH{o}s-P\'osa property

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keywords propertyanswersarbitrarycontainingedgeedge-erdevenfails
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Robertson and Seymour proved that the family of all graphs containing a fixed graph $H$ as a minor has the Erd\H{o}s-P\'osa property if and only if $H$ is planar. We show that this is no longer true for the edge version of the Erd\H{o}s-P\'osa property, and indeed even fails when $H$ is an arbitrary subcubic tree of large pathwidth or a long ladder. This answers a question of Raymond, Sau and Thilikos.

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