What is ... a Sphere Packing?

This page hosts information on Albert Haase's talk "What is ... a Sphere Packing?" at the "What is ...?" seminar. This talk will help you better understand the talk by Henry Cohn.

Where & When

  • Friday, July 8, 1.00pm in the Meitner hall at Harnack Haus


  • We will discuss what a (lattice) sphere packing is and how its density can be defined. Then, we will look at examples in dimensions 2, 3, and perhaps 4. We will also introduce the related kissing number problem. Finally, we will survey known results and look at a rather puzzling plot of the densities – by dimension – of the densest sphere packings known. If we have time, we can discuss the two lattices (E_8 and Leech lattice) that lead to the packings in dimensions 8 and 24 that were recently shown to have highest possible density.
Topic revision: r1 - 06 Jul 2016, KonstantinPoelke
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