
Journal for Geometry and Graphics 23 (2019), No. 1, 001003 Copyright Heldermann Verlag 2019 On the Number of Points at Distance at Least 1 in the Unit FourDimensional Cube Peter Adamko Dept. of Quantitative Methods, University of Zilina, Univerzitna 8215/1, 010 26 Zilina, Slovakia peter.adamko@fpedas.uniza.sk We give an elementary proof of the following theorem: The maximum number of points which one can choose in the unit fourdimensional cube so that all mutual distances are at least one is 17. Keywords: Extremum, packing of cubes. MSC: 52C17. [ Fulltextpdf (165 KB)] 