2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148644We consider the magnetization of the three-dimensional ferromagnetic near the critical temperature in the mean field approximation. It is found that for some directions of easy magnetization one obtains exponent 1/4 instead of the usual 1/2.6 pages, LaTeX, 4-figures, sign error corrected in formula 8Condensed Mattertext