81Sxx General quantum mechanics and problems of quantization

81S05  Commutation relations
81S10  Geometric quantization, symplectic methods, See Also {
               58F06}
81S20  Stochastic quantization
81S25  Quantum stochastic calculus
81S30  Phase space methods including Wigner distributions, etc.
81S40  Path integrals, See also {58D30}
81S99  None of the above but in this section