The problem of existence of time-periodic solutions for the time-dependent GinzburgLandau equations of superconductivity is discussed. It is assumed that the applied magnetic field H is τ -periodic in time, and so is the associated dynamical process. We prove the existence of τ -periodic solutions in time, which are exactly the fixed points of the associated period mapping.
Mathematics Subject Classification (2000). Primary 35K55. Secondary 35B40, 35B65, 35K15, 82D55.