While the above formulas give a nice understanding of the Weyl quantization of a very general observable on phase space, they are not very convenient for computing on simple observables, such as those that are polynomials in q and p . In later sections, we will see that on such polynomials, the Weyl quantization represents the totally symmetric ordering of the noncommuting operators Q and P . For example, the Wigner map of the quantum angular-momentum-squared operator L is not just the classical angular momentum squared, but it further contains an offset term −3 ħ /2, which accounts for the nonvanishing angular momentum of the ground-state Bohr orbit.