Return how many integer grid points there are inside a 3D sphere of radius r centred at (0,0,0) (including points on the edge).
Neither string operations nor interpolations are allowed!
Counting in Finnish
Matrix indexing with two vectors of indices
Return the first and last character of a string
Fill a zeros matrix
Length of a short side
Radial Zernike polynomials
Chebyshev polynomials of the 2nd Kind
Hexagonal Tiling Dots in a Circle
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