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Bicolored point sets admitting non-crossing alternating Hamiltonian paths

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arxiv 2404.06105 v1 pith:Z222WZYY submitted 2024-04-09 math.CO

classification math.CO
keywords pointspolygonbicoloredbluehamiltonianlyingnon-crossingpoint
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abstract

Consider a bicolored point set $P$ in general position in the plane consisting of $n$ blue and $n$ red points. We show that if a subset of the red points forms the vertices of a convex polygon separating the blue points, lying inside the polygon, from the remaining red points, lying outside the polygon, then the points of $P$ can be connected by non-crossing straight-line segments so that the resulting graph is a properly colored closed Hamiltonian path.

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Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On plane cycles in geometric multipartite graphs

    cs.CG 2025-06 reject novelty 7.0 of 10

    New bounds and an FPT algorithm for plane cycles in geometric bipartite graphs, but the main characterization theorem is refuted by a four-point counterexample.

  2. NP-Hardness of Non-Crossing Hamiltonian Path and Cycle in Non-Planar Graphs

    cs.CG 2026-08 conditional novelty 6.0 of 10

    A direct 3-SAT reduction proves NP-completeness of non-crossing Hamiltonian path and cycle in embedded non-planar graphs, avoiding planar crossover gadgets.

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