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Classification theorem for strong triangle blocking arrangements

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arxiv 1809.08639 v1 pith:GNEGYTD6 submitted 2018-09-23 math.CO

classification math.CO
keywords blockingtrianglepointsstrongarrangementarrangementsclassificationtheorem
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abstract

A strong triangle blocking arrangement is a geometric arrangement of some line segments in a triangle with certain intersection properties. It turns out that they are closely related to blocking sets. Our aim in this paper is to prove a classification theorem for strong triangle blocking arrangements. As an application, we obtain a new proof of the result of Ackerman, Buchin, Knauer, Pinchasi and Rote which says that $n$ points in general position cannot be blocked by $n-1$ points, unless $n = 2,4$. We also conjecture an extremal variant of the blocking points problem.

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Cited by 1 Pith paper

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

  1. On sets of $n$ points in general position that determine lines that can be pierced by $n$ points

    math.CO 2019-08 accept novelty 6.0 of 10

    Under an outside-segment piercing condition, any n-point general-position set together with its n piercing points is contained in a cubic curve.

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