接吻数問題
1. Kissing number problemIn geometry, a kissing number is defined as the number of non-overlapping unit spheres that touch another given unit sphere. For a lattice packing the kissing number is the same for every sphere, but for an arbitrary sphere packing the kissing number may vary from one sphere to another. Other names for kissing number that have been used are Newton number (after the originator of the problem), and contact number.
Read “Kissing number problem” on English Wikipedia
Read “接吻数問題” on Japanese Wikipedia
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Read “Kissing number problem” on English Wikipedia
Read “接吻数問題” on Japanese Wikipedia
Read “Kissing number problem” on DBpedia
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