Kirkman's schoolgirl problem
Coloured with carmine.
(mathematics) A problem in combinatorics, in which 15 schoolgirls go walking three abreast for seven days in succession, and must be arranged so that no two walk abreast more than once.
plural of catess
(botany) A species of legume, Caragana arborescens native to Siberia, parts of China and neighboring Mongolia and Kazakhstan.
組合せ論のゼミでは、15人の少女を3人一組で7日間にわたって並ばせ、どの2人も横並びになるのが二度とならないように配置するという問題を1回の授業で徹底的に分析し、それに対応するスケジュールを作成しました。
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