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.
@Ling Liang , take some tolerance while checking the equality of eigen value with zero.
Make the vector [1 2 3 4 5 6 7 8 9 10]
Convert a vector into a number
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Detect a number and replace with two NaN's
Flip the vector from right to left
Sum of series IV
Sum of series I
Sum of series II
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