Abstract
For any integersn, d ≥ 2, letП(n, d) be the largest number such that every setP ofn points inR d contains two pointsx, y ∈ P satisfying |boxd(x, y) ∩ P| ≥П(n, d), where boxd(x, y) means the smallest closed box with sides parallel to the axes, containingx andy. We show that, for any integersn,\(d \geqslant 2,\frac{2}{{(2\sqrt 2 )^{2^d } }}n + 2 \leqslant \prod (n,d) \leqslant \frac{2}{{7^{[d/5]} 2^{2^{d - 1} } }}n + 5\), which improves the lower bound due to Grolmusz [9] by a short self-contained proof.
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Partially supported by the Grant in Aid for Scientific Research of the Ministry of Education, Science and Culture of Japan and by the Grant for Basic Science Research Projects of the Sumitomo Foundation.
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Ishigami, Y. Containment problems in high-dimensional spaces. Graphs and Combinatorics 11, 327–335 (1995). https://doi.org/10.1007/BF01787813
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DOI: https://doi.org/10.1007/BF01787813