The effect of a change of the initial wave function of the cooper minima

The Cooper minima with two different method have been calculated. First, the calculations of Cooper minima have used self-consistent-field Hartree-Fock-Slater initial and final state wave functions; Second, the calculations of Cooper minima have used self-consistent-field Hartree-Fock initial state wave function and self-consistent-field Hartree-Fock-Slater final state wave function. Finally, authors have made a comparison between the two calculated results. The Cooper minima energy of the second method is smaller than that of the first method