
Accession Number : AD0701082
Title : NOTE ON FUZZY LANGUAGES.
Descriptive Note : Research rept.,
Corporate Author : CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB
Personal Author(s) : Lee,E. T. ; Zadeh,L. A.
Report Date : NOV 1969
Pagination or Media Count : 25
Abstract : A fuzzy language is defined to be a fuzzy subset of the set of strings over a finite alphabet. The notions of union, intersection, concatenation, Kleene closure and grammar for such languages are defined as extensions of the corresponding notions in the theory of formal languages. An explicit expression for the membership function of the language L(G) generated by a fuzzy grammar G is given and it is shown that any contextsensitive fuzzy grammar is recursive. For fuzzy contextfree grammars, procedures for constructing the Chomsky and Greibach normal forms are outlined and illustrated by examples. (Author)
Descriptors : (*LINGUISTICS, SET THEORY), STOCHASTIC PROCESSES, CONTEXT FREE GRAMMARS, CONTEXT SENSITIVE GRAMMARS, COMPUTATIONAL LINGUISTICS, AUTOMATA
Subject Categories : Linguistics
Distribution Statement : APPROVED FOR PUBLIC RELEASE