  We consider wires near a zero temperature transition between superconducting
and metallic states. The critical theory obeys hyperscaling, which leads to a
universal frequency, temperature, and length dependence of the conductance;
quantum and thermal phase slips are contained within this critical theory.
Normal (NN), superconducting (SS) and mixed (SN) leads on the wire determine
distinct universality classes. For the SN case, wires near the critical point
have a universal d.c. conductance which is independent of the length of the
wire at low temperatures.
