Category:Definitions/Ordinal Spaces

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This category contains definitions related to Ordinal Spaces.
Related results can be found in Category:Ordinal Spaces.


Let $\Gamma$ be a limit ordinal.


Open Ordinal Space

The open ordinal space on $\Gamma$ is the set $\hointr 0 \Gamma$ of all ordinal numbers (strictly) less than $\Gamma$, together with the order topology.


Closed Ordinal Space

The closed ordinal space on $\Gamma$ is the set $\closedint 0 \Gamma$ of all ordinal numbers less than or equal to $\Gamma$, together with the order topology.