Classically, the angular momentum of a particle (with respect to the origin) is given by the formula
$$ L = \mathbf{r} \times \mathbf{p}, $$
which is to say,
$$ L_x = y p_z - z p_y, \quad L_y = z p_x - x p_z, \quad L_z = x p_y - y p_x. $$________________________________________
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Author of the notes: Antonio J. Pan-Collantes
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