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This paper presents UD-statistics almost coinciding with Gentile statistics for negative chemical potentials, but having another extension in the case of positive chemical potentials. The physical meaning of the metamorphosis of the phase transition of the third kind to the phase transition of the first kind is explained. The coincidence of isochores and isotherms in the supercritical domain corresponding...
In this paper, we refine some of the original notions, such as the number of degrees of freedom, for an arbitrary temperature and an ideal Boltzmann-Maxwell gas. Using the van der Waals model, we illustrate the notion of Frenkel temperature, which separates soft and rigid liquid.
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