65.132 IsLatinSquare

IsLatinSquare( M )

IsLatinSquare determines if a matrix M is a latin square. For a latin square of size n by n, each row and each column contains all the integers 1..n exactly once.

    gap> IsLatinSquare([[1,2],[2,1]]);
    true
    gap> IsLatinSquare([[1,2,3],[2,3,1],[1,3,2]]);
    false 

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