Replicate each element of a row vector (with NaN) a constant number of times.
n=2, A=[1 2 3] -> [1 1 2 2 3 3]
n=0, A=[2 1] -> 
Remove the polynomials that have positive real elements of their roots.
radius of a spherical planet
Who has power to do everything in this world?
Numbers spiral diagonals (Part 2)
Find files with extension ext in the current directory
Find indices of diagonal elements
Divisors for big integer
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