Cube Line Picking
Cube Line Picking
复制标题
立方体线拾取
DOI:
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发表时间:
2000
期刊:
影响因子:
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通讯作者:
E. Weisstein
中科院分区:
文献类型:
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作者:
E. Weisstein
The average distance between two points chosen at random inside a unit cube (the n=3 case of hypercube line picking), sometimes known as the Robbins constant, is Delta(3) = 1/(105)[4+17sqrt(2)-6sqrt(3)+21ln(1+sqrt(2))+42ln(2+sqrt(3))-7pi] (1) = 1/(105)[4+17sqrt(2)-6sqrt(3)+21sinh^(-1)1+42ln(2+sqrt(3))-7pi] (2) = 0.66170... (3) (OEIS A073012; Robbins 1978, Le Lionnais 1983). The probability function as a function of line length, illustrated above, was found in (nearly) closed form by...