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The article uses both forms interchangeably; this is a bit strange. I do not know if one term is more prevalent in literature than another, but it would be nice to have uniformity at least in the article - and a note about the alternate form.
195:. At some point, it might be worthwhile to create a separate article covering the hyperarithmetical hierarchy in more depth, but for now this article at least gives it some coverage, although it isn't the main subject of this article. — Carl
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Might this article (hyperarithmetical theory) be profitably moved/renamed to "hyperarithmetical hierarchy"?
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Hello! Thanks v. much for creating this page, which I _believe_ fills a long-standing need for a page on
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Knowledge. If you would like to participate, please visit the project page, where you can join
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The redirect is a good idea; I overlooked it. This article shouldn't be renamed to
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