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Название: Phase transition of hard hexagons on a triangular lattice
Авторы: Ole J. Heilmann, Eigil Praestgaard
Systems of hard hexagons on a triangular lattice are investigated. The orientation of the hexagons is kept fixed, while the size of the hexagons is varied. The existence of a phase transition is proved for all sizes by means of the Peierls'argument. The proof does not imply a phase transition in the continuous limit.