2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26817The relation between critical exponents, characterizing a continuous phase transition, and the fractal structure of physical lines, proliferating at the critical point, is established by considering the two-dimensional O($N$) spin model for which many exact results are available.3 pages, 1 figureStatistical Mechanicstext