Cofinality: Difference between revisions
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* [[0]], [[1]] and [[Omega|\(\omega\)]] are regular. |
* [[0]], [[1]] and [[Omega|\(\omega\)]] are regular. |
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* All natural numbers other than \(1\) are singular. |
* All natural numbers other than \(0\) and \(1\) are singular. |
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* All countable ordinals other than \(\omega\) are singular. |
* All countable infinite ordinals other than \(\omega\) are singular. |
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* \(\mathrm{cof}(\alpha)\) is regular for any \(\alpha\). |
* \(\mathrm{cof}(\alpha)\) is regular for any \(\alpha\). |
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