On covering systems on rings
Štefan Porubský (1978)
Mathematica Slovaca
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Štefan Porubský (1978)
Mathematica Slovaca
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Carlos Uzcátegui (1992)
Fundamenta Mathematicae
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The covering property for σ-ideals of compact sets is an abstract version of the classical perfect set theorem for analytic sets. We will study its consequences using as a paradigm the σ-ideal of countable closed subsets of .
Giuliano Artico, Umberto Marconi, Roberto Moresco (1981)
Rendiconti del Seminario Matematico della Università di Padova
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C. Kohls (1958)
Fundamenta Mathematicae
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C. Jayaram (2004)
Archivum Mathematicum
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In this paper we establish some new characterizations for -rings and Noetherian -rings.