# Category:Definitions/Ordinal Sequences

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This category contains definitions related to Ordinal Sequences.

Related results can be found in Category:Ordinal Sequences.

An **ordinal sequence** is a mapping $\theta$ whose domain is an ordinal $\alpha$.

That is, the domain of $\theta$ is the set of all ordinals $\gamma$ such that $\gamma < \alpha$.

Such a sequence can be referred to as an **$\alpha$-sequence**.

Hence an **$\On$-sequence** is a mapping whose domain is the class of all ordinals $\On$.

## Pages in category "Definitions/Ordinal Sequences"

The following 5 pages are in this category, out of 5 total.