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K_6 minors in 6-connected graphs of bounded tree-width

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arxiv 1203.2171 v2 pith:PRZUSH3D submitted 2012-03-09 math.CO cs.DM

classification math.COcs.DM
keywords connectedgraphsboundedgraphholdssufficientlytree-widthconclusion
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We prove that every sufficiently big 6-connected graph of bounded tree-width either has a K_6 minor, or has a vertex whose deletion makes the graph planar. This is a step toward proving that the same conclusion holds for all sufficiently big 6-connected graphs. Jorgensen conjectured that it holds for all 6-connected graphs.

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  1. On vertex sets inducing tangles

    math.CO 2024-11 conditional novelty 7.0 of 10

    Every k-tangle in a graph is the lift of a k-tangle in a topological minor of size bounded by a function of k, reducing the vertex-set induction problem to bounded-size graphs.

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