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Nonanalyticity of the beta-function and systematic errors in field-theoretic calculations of critical quantities

M. Caselle, A. Pelissetto, E. Vicari

hep-tharXiv:hep-th/0010228

Abstract

We consider the fixed-dimension perturbative expansion. We discuss the nonanalyticity of the renormalization-group functions at the fixed point and its consequences for the numerical determination of critical quantities.

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