Although mathematical models of language have been studied in the computational linguistics milieu, via Markov models (Manning and Schuetze 1999), Zipf's law and its modifications (Mandelbrot 1953;Zipf 1965;Bell, Cleary, and Witten 1990), and Pitman-Yor models (Teh 2006) more recently, the true mathematical model of linguistic processes is ultimately unknown.
the convergence of a constancy measure must be examined through empirical verification.