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\title{Countable Ordinals}
\author{Brian Huffman}
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\begin{abstract}
This development defines a well-ordered type of countable ordinals.
It includes notions of continuous and normal functions, recursively
defined functions over ordinals, least fixed-points, and derivatives.
Much of ordinal arithmetic is formalized, including exponentials and
logarithms. The development concludes with formalizations of Cantor
Normal Form and Veblen hierarchies over normal functions.
\end{abstract}

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