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Название: Infinite-Order Phase Transition in a Classical Spin System
Авторы: Costin O., Costin R.D., Grunfeld C.P.
Аннотация:
For an exactly soluble classical spin model with tong-range inhomogeneous coupling it is proved that in the absence of external magnetic field the free energy is a C^(oo) function of the temperature at the critical point.