On the diagonal number of topological spaces (Q756740)
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scientific article; zbMATH DE number 4192606
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On the diagonal number of topological spaces |
scientific article; zbMATH DE number 4192606 |
Statements
On the diagonal number of topological spaces (English)
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1990
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Let \(\Delta\) (X) and pw(X) denote the diagonal number and the pseudo- weight of a space X. There exists a regular Lindelöf first countable space Y such that \(pw(Y)=\omega\) and \(\Delta (Y)=2^{\omega}\).
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Hausdorff number
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net weight
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Lindelöf number
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diagonal number
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pseudo- weight
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