▎ 摘　　要

The group-theoretical study of an electron in a two-dimensional lattice in the presence of a magnetic field yields lattices of lines of magnetic flux. The symmetry of the system is described by the magnetic translation group. The structure of the group has been determined for a selected gauge. The calculation was performed for a finite lattice corresponding to nano-scale carbon structures. (C) 2007 Elsevier B.V. All rights reserved.