2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18644Using the Anderson model for disordered systems the fluctuations in electron spectra near the metal--insulator transition were numerically calculated for lattices of sizes up to 28 x 28 x 28 sites. The results show a finite--size scaling of both the level spacing distribution and the variance of number of states in a given energy interval, that allows to locate the critical point and to determine the critical exponent of the localization length.6 pages, PDF, 6 fig, talk at the NATO Advanced Research Workshop on Submicron Quantum Dynamics, Trieste, Italy, June 1994Disordered Systems and Neural NetworksMesoscale and Nanoscale Physicstext