  It is argued that the penetration depth and the correlation length at the
critical point of the 3D superconductor diverge with the same critical
exponents, as follows from the general scaling arguments and from the
independent calculations in both Ginzburg-Landau and its dual theory. The
incorrect prediction of Kiometzis, Kleinert and Schakel (KKS) that this is is
not so, is the result of the faulty treatment of the dual theory, in which two,
instead of one, coupling constants are tuned to reach the critical point. The
recent paper by the present author criticized by KKS in cond-mat/9702159
differs on this point from KKS, and consequently finds the expected relation
between the divergence of the two lengths in the critical region.
