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DTSTART;VALUE=DATE:20171212T171500
DTEND;VALUE=DATE:20171212T171500
UID:5773@agenda.unifr.ch
DESCRIPTION:The sphere packing problem is to find an arrangement of non-overlapping unit spheres in the $d$-dimensional Euclidean space  in which the spheres fill as large a proportion of the space as possible. In this talk we will present a solution of the sphere packing problem in dimensions 8 and 24. In 2003 N. Elkies and H. Cohn  proved that the existence of a real function satisfying certain constrains leads to an upper bound for the sphere packing constant. Using this method they obtained almost sharp estimates in dimensions 8 and 24. We will show that functions providing exact bounds can be constructed explicitly as certain integral transforms of modular forms. Therefore, the sphere packing problem in dimensions 8 and 24 is solved by a linear programming method.\n
SUMMARY:Prof. Maryna Viazovska (EPFL): The sphere packing problem in dimensions 8 and 24 - CANCELLED
CATEGORIES:Colloque / Congrès / Forum
LOCATION:PER 08\, Phys 2.52\, Chemin du Musée 3\, 1700 Fribourg
URL;VALUE=URI:https://agenda.unifr.ch/e/fr/5773
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