Given n balls of radius r and the vector p (nx3) with all position (x,y,z) of the balls, return the symmetric matrix A (nxn) containing all distance between the centroid of all balls (diagonal terms should be all 0).
Two or more balls can overlap.
I think there is some rounding difference here... :-(
Make a checkerboard matrix
Determine whether a vector is monotonically increasing
Is this matrix orthogonal?
Derivative of polynomial
subtract central cross
frame of the matrix
Find the function
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