May I ask what is the definition of Nilpotent matrix. I suppose that is A^k =0 for some k? If I am right, then 0 must be an eigenvalue of A, then there is some issues for the test problems.
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Prime factor digits
Back to basics 26 - Keywords
Sum the entries of each column of a matrix which satisfy a logical condition.
Sum of series I
Sum of series V
Sum of series VI
Sum of series II
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