X-Nico

Complete set of commuting observables

Also, the Hamiltonian $\backslash hat\{H\}\; =\; -\backslash frac\{\backslash hbar^2\}\{2\backslash mu\}\backslash nabla^2\; -\; \backslash frac\{Ze^2\}\{r\}$ is a function of $r$ only and has rotational invariance, where $\backslash mu$ is the reduced mass of the system.

see also