On the quantum Hall effect
The result of \textit{D. J. Thouless, M. Kohmoto, M. P. Nightingale} and \textit{M. Den Nijs} [Phys. Rev. Lett. 49, 405-408 (1982)] for a quantized Hall conductance in a two dimensional periodic potential and homogeneous magnetic field perpendicular to the plane for which Kubo's expression for conductivity of the Hall current is an integer, is interpreted geometrically.
scientific article; zbMATH DE number 3964565