Covering and packing with spheres by diagonal distortion in Rn

  • Authors:
  • Herbert Edelsbrunner;Michael Kerber

  • Affiliations:
  • Institute of Science and Technology Austria, Klosterneuburg, Austria and Departments of Computer Science and of Mathematics, Duke University, Durham, North Carolina and Geomagic, North Carolina;Institute of Science and Technology Austria, Klosterneuburg, Austria

  • Venue:
  • Rainbow of computer science
  • Year:
  • 2011

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Abstract

We address the problem of covering Rn with congruent balls, while minimizing the number of balls that contain an average point. Considering the 1-parameter family of lattices defined by stretching or compressing the integer grid in diagonal direction, we give a closed formula for the covering density that depends on the distortion parameter. We observe that our family contains the thinnest lattice coverings in dimensions 2 to 5. We also consider the problem of packing congruent balls in Rn, for which we give a closed formula for the packing density as well. Again we observe that our family contains optimal configurations, this time densest packings in dimensions 2 and 3.