Asymmetric Rotor. Convergence in the Continued-Fraction Expansion of the Reduced Energies

Computation of the energy levels of the asymmetric rotor often involves the use of successive approximations which may converge slowly to the required result. The theory of convergence in the continued-fraction expansion of the reduced energies is here discussed and used to derive corrections which, where necessary, materially reduce the computational effort involved in obtaining solutions.