Book ChapterDOI
Simple EOL Forms under Uniform Interpretation Generating CF Languages
Jürgen Albert,Hermann A. Maurer,Grzegorz Rozenberg +2 more
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In this article, simple EOL forms (forms with a single terminal and a single nonterminal) under uniform interpretations are considered and the analysis of the generative power of such forms is presented.Abstract:
In this paper we consider simple EOL forms (forms with a single terminal and single nonterminal) under uniform interpretations We present a contribution to the analysis of generative power of simple EOL forms by establishing easily decidable necessary and sufficient conditions for simple EOL forms to generate (under uniform interpretations) CF languages onlyread more
Citations
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Journal ArticleDOI
Synchronized EOL forms under uniform interpretation
TL;DR: A ""strongest"" possible normaljorm resuit, the spanning normalJorm theorem; the non-existence oj uni-generatorsjor "reasonable" language amilies, which include the finite, regular and context-jree j amilies; and a char act erization oj those ynchronized jorms which, under uniform interprétation, yield all regular languages.
Book ChapterDOI
A survey of grammar and l forms-1978
TL;DR: The present paper gives an overview of grammar and L form theory as of January 31, 1979 and presents some new results on grammar forms the main thrust of the paper is to survey L forms.
Journal ArticleDOI
Sub context-free L forms †
TL;DR: It is shown that if F generates only CF languages then all languages generated by F are indeed linear, and that for arbitrary OL forms F it is decidable whether or not F generatesonly CF languages.
Book ChapterDOI
New Aspects of Homomorphisms
TL;DR: This work uses lengthpreserving homomorphisms to define grammatical similarity and discusses some striking results from the fast growing area of grammar forms and L forms.
References
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Journal ArticleDOI
Developmental systems without cellular interactions, their languages and grammars.
TL;DR: Theorems were obtained concerning partial characterizations of the class of developmental systems without cellular interactions, and some of the mathematical properties of this class are discussed.
Journal ArticleDOI
Context-free grammar forms
TL;DR: In an attempt to provide a unified theory of grammars, a model is introduced which has two components, a ''grammar form,'' which provides the general structure of the productions in the grammar form, and an ''interpretation'', which yields a specific grammar.
Journal ArticleDOI
On 0L-Languages
Grzegorz Rozenberg,P. G. Doucet +1 more
TL;DR: In 0 L -languages, words are produced from each other by the simultaneous transition of all letters according to a set of production rules; the context is ignored.
Journal ArticleDOI
On Good EOL Forms
TL;DR: The notion of a good EOL form is introduced as an important generalization of the notion of complete and very complete EOL forms and Transformations preserving the property good are obtained.