  The superconducting state in a fully frustrated wire network with the dice
lattice geometry is investigated in the vicinity of the transition temperature.
Using Abrikosov's variational procedure, we write the Ginzburg-Landau free
energy functional projected on its unstable supspace as an effective model on
the triangular lattice of sixfold coordinated sites. For this latter model, we
obtain a large class of degenerate equilibrium configurations in one to one
correspondence with those previously constructed for the pure XY model on the
maximally frustrated dice lattice. The entropy of these states is proportional
to the linear size of the system. Finally we show that magnetic interactions
between currents provide a degeneracy lifting mechanism.
