SENSITIVITY OF THE RADIUS OF CONVENGENCE OF THE SERIES FOR SUPERCONDUCTING Tc TO THE HIGH-FREQUENCY BEHAVIORS OF PHONON SPECTRAL FUNCTION
Tc级数的收敛半径对声子谱高频行为的敏感性

On the basis of a recent discussion on the analytical properties of the first order equation for Tc, we show, by concrete examples, that the radius of convergence of the series for superconducting critical temperature is so sensitive to the high-frequency behaviors of the phonon spectral function, that it is inadequate for it to serve as a critical quantity in the criterion for dividing superconductors into type A and type B.