Sphere-packings, lattices, and groups
Sphere-packings, lattices, and groups
Geometry and topology for mesh generation
Geometry and topology for mesh generation
Some combinatorial Lemmas in topology
IBM Journal of Research and Development
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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.