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A note on Hornich's problem

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Abstract.

This note, by applying Dirichlet's approximation theorem, achieves an upper bound for Hornich's problem, the problem to determine the smallest number of nonoverlapping unit spheres which can block all the light rays starting from the center of a fixed one.

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Authors and Affiliations

  1. Department of Mathematics, University College London, Gower Street, GB-WC1E 6BT London, Great Britain, , , , , , GB

    Chuanming Zong

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  1. Chuanming Zong
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Received: 23.12.1997

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Zong, C. A note on Hornich's problem. Arch. Math. 72, 127–131 (1999). https://doi.org/10.1007/s000130050313

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  • DOI: https://doi.org/10.1007/s000130050313

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