Calculate roots of polynomial given as vector array.
x=[1 2 0 5 0 3]
0.4784 + 1.0983i;
0.4784 - 1.0983i;
-0.1150 + 0.8680i;
-0.1150 - 0.8680i]
2 b | ~ 2 b
Basics: 'Find the eigenvalues of given matrix
Replace every 3rd element in a vector with 4
For given xx,x, y vectors build spline of x and y and find yy values for xx vector.
Sum positive elements of matrix.
Calculate the sum of elements of n*n Hilbert matrix.
Delete x value in given vector y.
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