Nesting of shuffle closure is important (Q1096398)
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scientific article; zbMATH DE number 4031015
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Nesting of shuffle closure is important |
scientific article; zbMATH DE number 4031015 |
Statements
Nesting of shuffle closure is important (English)
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1987
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The aim of this paper is to study the properties of languages generated by shuffle expressions with no * operator nested. It is shown that this class of languages forms a proper subclass of all the shuffle languages and it thus answers the open problem of \textit{J. Gischer} [Commun. ACM 24, 597-605 (1981; Zbl 0471.68063)] and establishes a result similar to the one concerning flow languages [\textit{T. Araki, T. Kagimasa} and \textit{N. Tokura}, Theor. Comput. Sci. 15, 51-75 (1981; Zbl 0473.68075)].
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shuffle operator
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shuffle closure
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shuffle languages
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