Also known as a Latin square. n different symbols are arranged in a square with n rows and n columns, with each symbol appearing exactly once in each row and column. When two such n-th order Latin squares are stacked on top of each other, if all n 2 combinations of the symbols in each square appear in the n 2 columns, the two Latin squares are said to be orthogonal to each other, and the square obtained by stacking them is called a Greco-Latin square or Euler square. Greco-Latin squares always exist except for the cases of n = 2 and 6. These squares are used in experimental design. Source : Heibonsha Encyclopedia About MyPedia Information |
ラテン方格とも。n個の異なる記号をn行n列の正方形に並べ,各行・各列にどの記号もちょうど1回ずつ現れるようにしたもの。このようなn次のラテン方陣を二つ重ねたとき,n2個の欄に各方陣の記号のn2通りの組合せが全部現れるならば,この二つのラテン方陣は互いに直交するといい,重ねて得られた方陣をグレコラテン方陣またはオイラー方陣という。グレコラテン方陣はn=2,6の場合以外は常に存在する。これらの方陣は実験計画法で利用される。
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