%0 Journal Article %T Geometrical and Algebraic Structures in Quantum Hall Systems %A J. C. Wallet %J Physics %D 2005 %I arXiv %X We review the main features of a mathematical framework encompassing some of the salient quantum mechanical and geometrical aspects of Hall systems with finite size and general boundary conditions. Geometrical as well as algebraic structures controlling possibly the integral or fractional quantization of the Hall conductivity are discussed. %U http://arxiv.org/abs/cond-mat/0503357v1