Oscillating Dynamics and Trajectory of the Single Vortex Line

The De Gennes and Matricon problem of flnding the spectrum of os-cillations of massive vortex line under the action of pinning and viscosityforces is solved. The obtained vibration spectrum of the vortex is discussedand the role of each contributing force is elucidated. The trajectory of thevortex motion is calculated and illustrated.PACS numbers: 74.25.Qt, 74.70.Ad