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We study the precessing motion of a vortex in a Bose-Einstein condensate ofatomic gases. In addition to the former zero-temperature studies, finitetemperature systems are treated within the Popov and semiclassicalapproximations. Precessing vortices are discussed utilizing the rotating frameof reference. The relationship between the sign of the lowest excitation energyand the direction of precession is discussed in detail.Comment: 6 pages, 9 figures. More discussion in Sec.III. Reference is update

Precessional motion of a vortex in a finite-temperature Bose-Einstein condensate