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IsDiagonal    --    checks if a matrix is diagonal


Syntax 
IsDiagonal(M: MAT): BOOL

Description
This function tests whether the square matrix M is diagonal.

Example 
/**/  M := mat([[0, 1, 2], [-1, 0, 3], [-2, -3, 0]]);
/**/  IsDiagonal(M);
false

See Also