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5.54.5  Rotational : curl

curl takes two arguments : a 3-d vector field depending on 3 variables.
curl returns the rotational of the vector, defined by:

curl([A,B,C],[x,y,z])= [∂ C/∂ y−∂ B/∂ z, ∂ A/∂ z−∂ C/∂ x, ∂ B/∂ x−∂ A/∂ y]

Note that n must be equal to 3.
Input :


Output :


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