Relative differences in the square roots of the eigenvalues of the Laplace tidal equation of the prograde sectoral g modes from the asymptotic values of m for m = 1−5 as functions of the spin parameter s. The vertical solid line indicates s = 1, the limit of the sub-inertial regime, s >  1, in which the effect of the Coriolis force is important, and where the approximation of is valid.