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[几何] 球内的六个相等的球

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青青子衿 Posted 2014-2-22 12:36 |Read mode

球内的六个相等的球的半径的最大值

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realnumber Posted 2014-2-23 11:45

6个小球球心猜是在一个正八面体6个顶点上，此时$2R=(2+2\sqrt{2})r$，r为小球半径，R为大球半径.这类问题改为平面情况都是极难，一般情景似乎是未解决问题

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