Lines tangent to four unit spheres with coplanar centres

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    Abstract

    We prove that there are at most eight lines tangent to four unit spheres in ℝ3 if the centres of the spheres are coplanar, but not collinear. This bound is sharp.
    Original languageEnglish
    Pages (from-to)493-497
    Number of pages4
    JournalDiscrete & Computational Geometry
    Volume26
    Issue number4
    Publication statusPublished - Dec 2001

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