On Density of Pairs of Natural Numbers
Rzepecka, Genowefa (2015-12-08T07:20:54Z)
Acta Universitatis Lodziensis. Folia Mathematica
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Rzepecka, Genowefa (2015-12-08T07:20:54Z)
Acta Universitatis Lodziensis. Folia Mathematica
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James Foran (1977)
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David Lubell (1971)
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Guillaume Bordes (2005)
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Acta Mathematica Universitatis Ostraviensis
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In this paper it is discus a relation between -density and -density. A generalization of Šalát’s result concerning this relation in the case of asymptotic density is proved.
Michał Lorens (1974)
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Oto Strauch, Janos T. Toth (2002)
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RAIRO - Theoretical Informatics and Applications
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An alternative (tree-based) semantics for a class of regular expressions is proposed that assigns a central rôle to the + operator and thus to nondeterminism and nondeterministic choice. For the new semantics a consistent and complete axiomatization is obtained from the original axiomatization of regular expressions by Salomaa and by Kozen by dropping the idempotence law for + and the distribution law of • over +.
Timothy Rouch (1979)
Colloquium Mathematicae
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