Theory of an Isolated Vortex in a Pure Superconductor nearT=Tc

It is demonstrated that the theory of Bardeen, Kümmel, Jacobs, and Tewordt for an isolated vortex in a pure type-II superconductor at arbitrary temperatures is in agreement with the theory of Neumann and Tewordt near $T=T_c$ if nonanalytic terms of odd order in ${(1-\frac{T}{T_c})}^{\frac{1}{2}}$ in the free energy are assumed to vanish. The leading nonanalytic term is examined by the use of perturbation theory to see if it vanishes, but no definite conclusion can be drawn. The approximations used in deriving these results should prove useful in the application of the method of Bardeen et al. to other problems involving pure inhomogeneous superconductors.