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The q-state Potts models in two dimensions are studied with the Monte Carlo renormalization-group method. The results are in agreement with known properties. Combining our data with the qualitative picture of Nienhuis, Berker, Riedel, and Schick, we obtain a consistent description of the behavior of these models, including nearly singular behavior for $q>4$ (as proposed by Kim and Joseph) and suggesting logarithmic corrections to scaling for $q=4$.
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Rebbi et al. (1980) studied this question.
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