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Create a hierarchy by adding a (sub)category to a category page.
Create a hierarchy by adding a (sub)category to a category page.


{| class="wikitable"
{| class="wikitable" style="width: 75%;"
| Category:Mathematical logic hierarchies
| '''Category:Mathematical logic hierarchies'''
|-
|-
| In <nowiki>[[mathematical logic]]</nowiki>, these <nowiki>[[hierarchy (mathematics)|hierarchies]]</nowiki> classify various objects, such as real numbers (equivalently, sets of natural numbers) and sets of real numbers, based on various definability and complexity criteria.
| In <nowiki>[[mathematical logic]]</nowiki>, these <nowiki>[[hierarchy (mathematics)|hierarchies]]</nowiki> classify various objects, such as real numbers (equivalently, sets of natural numbers) and sets of real numbers, based on various definability and complexity criteria.

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Category:Mathematical logic hierarchies
In [[mathematical logic]], these [[hierarchy (mathematics)|hierarchies]] classify various objects, such as real numbers (equivalently, sets of natural numbers) and sets of real numbers, based on various definability and complexity criteria.

This category contains articles about these hierarchies as well as theorems and terms relating to them.

[[Category:Mathematical logic|Hierarchies]]
[[Category:Hierarchy]]