tailieunhanh - Báo cáo khoa học: "The use of formal language models in the typology of the morphology of Amerindian languages"

The aim of this work is to present some preliminary results of an investigation in course on the typology of the morphology of the native South American languages from the point of view of the formal language theory. With this object, we give two contrasting examples of descriptions of two Aboriginal languages finite verb forms morphology: Argentinean Quechua (quichua santiague˜ o) and Toba. | The use of formal language models in the typology of the morphology of Amerindian languages Andres Osvaldo Porta Universidad de Buenos Aires hugporta@ Abstract The aim of this work is to present some preliminary results of an investigation in course on the typology of the morphology of the native South American languages from the point of view of the formal language theory. With this object we give two contrasting examples of descriptions of two Aboriginal languages finite verb forms morphology Argentinean Quechua quichua santiagueho and Toba. The description of the morphology of the finite verb forms of Argentinean quechua uses finite automata and finite transducers. In this case the construction is straightforward using two level morphology and then describes in a very natural way the Argentinean Quechua morphology using a regular language. On the contrary the Toba verbs morphology with a system that simultaneously uses prefixes and suffixes has not a natural description as regular language. Toba has a complex system of causative suffixes whose successive applications determinate the use of prefixes belonging different person marking prefix sets. We adopt the solution of Crei-der et al. 1995 to naturally deal with this and other similar morphological processes which involve interactions between prefixes and suffixes and then we describe the toba morphology using linear context-free . 1 Introduction It has been proved Johnson 1972 Kaplan and Kay 1994 that regular models have an expre- 1This work is part of the undergraduate thesis Finite state morphology The Koskenniemi s two level morphology model and its application to describing the morphosyntaxis of two native Argentinean languages sive power equal to the noncyclic components of generative grammmars representing the morphophonology of natural languages. However these works make no considerations about what class of formal languages is the natural for describing the morphology of one .

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