Kissing number
1차원에서는 2, 2차원에서는 6, 3차원에서는 12, 4차원에서는 24
2차원의 kissing number = 6
8차원에서는 240, 24차원에서는 196560 임이 알려져 있음.
Sphere packings
kissing number = 12
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8차원에서는 240, 24차원에서는 196560 임이 알려져 있음.
The On-Line Encyclopedia of Integer Sequences
High accuracy semidefinite programming bounds for kissing numbers
[Musin08]The kissing number in four dimensions
New upper bounds for kissing numbers from semidefinite programming
[Musin05]An extension of Delsarte's method. The kissing problem in three and four dimensions
Kissing numbers, sphere packings and some unexpected proofs
Lattices, Linear Codes and Invariants, Part I.
Lattices, Linear Codes and Invariants,. Part II
Sphere Packings, Lattices and Groups (Grundlehren der mathematischen Wissenschaften)