check_spin_addition_rule

rydstate.angular.utils.check_spin_addition_rule(s_1, s_2, s_tot)

Check if the spin addition rule is satisfied.

If any of the quantum numbers is Unknown, return True. Else check the following conditions: \(|s_1 - s_2| \leq s_{tot} \leq s_1 + s_2\) and \(s_1 + s_2 + s_{tot}\) is an integer

Return type:

bool

Parameters:

• s_1 (float | Unknown)

• s_2 (float | Unknown)

• s_tot (float | Unknown)