Mathias-Copeman Peng-Robinson Equation of State (Mathias-Copeman alpha function)

The Mathias-Copeman Peng-Robinson Equation of State is described in:

P.M. Mathias and T.W. Copeman, Extension of the Peng-Robinson Equation-of-state To Complex Mixtures: Evaluation of the Various Forms of the Local Composition Concept, Fluid Phase Equilib., 1983, 13, 91.

Details of the equation implementation in TDE are provided here Parameters determined in TDE are:

critical temperature: T_c, critical pressure: p_c, acentric factor: w, parameters L, M, and N, and the volume translation term: v_t

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