出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We consider a two-dimensional -model with discrete icosahedral/
dodecahedral symmetry. Using the perturbative renormalization group, we
argue that this model has a di
erent continuum limit with respect to the O(3) model.
Such an argument is con rmed by a high-precision numerical simulation.
