2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128098For Encyclopedia of Complexity and Systems Science (Springer Verlag). No abstract. I. Definition and Introduction II. Methods III. Quantities and Exponents IV. Fractal Dimension; Incipient Infinite Cluster V. Simple Renormalisation Group VI. Future DirectionsReview, 19 pages including all figuresDisordered Systems and Neural NetworksStatistical Mechanicstext