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    [14] Phase transitions in generalized chiral or Stiefel's models
    D. Loison , Euro. J. Phys. B. 15 (2000) 517
    We study by Monte Carlo simulations the phase transition in generalized chiral or Stiefel's models. These models are characterized by a breakdown of symmetry $O(N)/O(N-P)$. We show that for $P=N$ and $P=N-1$ the phase transition is clearly of first order for $N \ge 3$ contrary to predictions based on the Renormalization Group in $4-\epsilon$ expansion.
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