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[几何] 每条直线上3个点,不同的构型有多少个

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hbghlyj posted 2025-3-10 00:29 |Read mode
arxiv.org/pdf/1912.08115
每条直线上3个点,不同的构型
$C_1$ = [{012}]
$C_2$ = [{012, 345}, {012, 034}]
$C_3$ = [{012, 034, 056}, {012, 034, 135}, {012, 034, 156}, {012, 034, 567}, {012, 345, 678}]
$C_l$ 有多少个?A082789
primeConf-1.png

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