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Emergence of order in random languages

2019-02-20
E. DeGiuli

Abstract

We consider languages generated by weighted context-free grammars. It is shown that the behaviour of large texts is controlled by saddle-point equations for an appropriate generating function. We then consider ensembles of grammars, in particular the Random Language Model of E. DeGiuli, Phys. Rev. Lett., 2019. This model is solved in the replica-symmetric ansatz, which is valid in the high-temperature, disordered phase. It is shown that in the phase in which languages carry information, the replica symmetry must be broken.

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URL

http://arxiv.org/abs/1902.07516

PDF

http://arxiv.org/pdf/1902.07516


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