A Result About the Density of Iterated Line Intersections in the Plane

Details A Result About the Density of Iterated Line Intersections in the Plane A Result About the Density of Iterated Line Intersections in the Plane

2005-07-22

arxiv.org/abs/math/0507472v2

Mathematics

Metric Geometry

10 pages, 8 figures (low-res for the arXiv), Computational Geometry: Theory and Applications

Scientific paper

Let $S$ be a finite set of points in the plane and let $\mathcal{T}(S)$ be the set of intersection points between pairs of lines passing through any two points in $S$. We characterize all configurations of points $S$ such that iteration of the above operation produces a dense set. We also discuss partial results on the characterization of those finite point-sets with rational coordinates that generate all of $\mathbb Q^2$ through iteration of $\mathcal{T}$.

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