Gramáticas e linguagens indiciais probabilísticas

Abstract

A new type of grammar for generating formal languages, called indexed gramar, was presented by Alfred V. Aho, in Austin, Texas, 1967. The languages generated by indexed grammars are called indexed languages. The class of languages generated by indexed grammars properly includes a11 context free languages and is a proper subset of the class of context sensitive languages. The objective in this work is to assign propability to each production of the indexed grammar and study the consistency of the indexed language generated by it.