2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18144This is an introduction to the microscopic theories of the FQHE. After a brief description of experiments, trial wavefunctions and the physics they contain are discussed. This is followed by a description of the hamiltonian approach, wherein one goes from the electrons to the composite fermions by a series of transformations. The theory is then compared to other theoretical approaches and to experiment.Based on Cargese Lectures, May 2001. 7 figures, needs attached style files, 31 pagesMesoscale and Nanoscale Physicstext