Products of non-\(\sigma\)-porous sets and Foran systems (Q2785348)
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scientific article; zbMATH DE number 980855
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Products of non-\(\sigma\)-porous sets and Foran systems |
scientific article; zbMATH DE number 980855 |
Statements
20 November 1997
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proper sequence
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\(\sigma \)-porosity
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metric space
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Foran system
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topologically complete space
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0.86446995
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0.86004406
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0.8494583
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0.84236044
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Products of non-\(\sigma\)-porous sets and Foran systems (English)
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Properties of some Foran systems for an abstract porosity in topologically complete metric spaces are investigated. Moreover, it is proved that the product of two non-\(\sigma \)-porous \(G_{\delta }\) sets in topologically complete metric spaces is also a non-\(\sigma\)-porous set.
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