I am having a problem with a couple of problems involving commutating operators. 1. The problem statement, all variables and given/known data 1. How do i find the commutation operators of x and ∂/∂x 2. If the angular momenta about 3 rotational axes in a central potential commute then how many quantum numbers we would get? And why will it be a problem? 2. Relevant equations 3. The attempt at a solution 1. For x i think it would be any F(x) is that so? and for ∂/∂x is it d/dx ? 2. I think we would get 4 quantum numbers , right?