Context-free grammars and languages play an important role in Linguistics and Computer Science. Introduced by Noam Chomsky in 1958 as tools for the description of natural language, it was soon realized that they also could be used for the design of programming languages. They are still in the ...
Kepser, S., Mo¨nnich, U.: Closure properties of linear context-free tree languages with an application to optimality theory. Theoretical Computer Science 354(1), 82-97 (2006)Kepser, Stephan and Uwe Mo¨nnich. 2006. Closure properties of linear context-free tree languages with an ...
The chapter is subdivided into sections on basic definitions, normal forms, structural properties, closure properties, decision problems, and algebraic characterization. For further information on basic notations, especially from mathematics, the reader is referred to the textbooks listed in the references...
We define context-free grammars with Müller acceptance condition that generate languages of countable words. We establish several elementary properties of the class of Müller context-free languages including closure properties and others. We show that
Theoretical or Mathematical/ context-free grammars/ strict interpretations master grammar reducibility closure properties generators language families context free grammar forms/ C4210 Formal logic DOI: 10.1016/0022-0000(80)90045-8 被引量: 40 年份...
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ClosureContextHelper(ElementWalker) Constructor that binds to an ElementWalker Properties 展开表 ClosureContext Get all the Context object from the walker Methods 展开表 AddClosureElementOperation(ClosureElementOperation) Add an element closure element operation to the associated context AddClosur...
Iterated TGR Languages: Membership Problem and Effective Closure Properties Summary: We show that membership is decidable for languages defined by iterated template-guided recombination systems when the set of templates is regular and the initial language is context-free. Using this result we show that...
If internal errors occur during the context closure, then they are printed to the configurederror output stream. If a context was closed, then its methods will throw anIllegalStateException, when invoked. If an attempt to close a context was successful, then consecutive calls to close have no...
An example is given of a context-free grammar with infinite index. This solves a problem proposed by Brainerd. The notion of index is extended to concern c... A Salomaa - 《Information & Control》 被引量: 78发表: 1969年 Closure properties of linear context-free tree languages with an app...