Abstract
We study the 4 lattice model with anisotropic short-range interactions. We show that the nonuniversal finite-size scaling functions of the anisotropic 4 model in a d-dimensional rectangular geometry are determined by the universal finite-size scaling functions of the isotropic 4 theory in a d-dimensional parallelepiped. Predictions are made for the Binder cumulant. In the bulk limit two-scale factor universality is absent in those universal critical-point amplitude relations that involve the correlation length.
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