Talk:Primitive recursive arithmetic: Difference between revisions

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{{maths rating|class=Start|priority=Low|field=foundations}}
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* <nowiki>[[First-order logic#Substitution|variable substitution]]</nowiki> The anchor (#Substitution) has been [[Special:Diff/296571032|deleted by other users]] before. <!-- {"title":"Substitution","appear":{"revid":51693523,"parentid":51681258,"timestamp":"2006-05-05T15:53:14Z","removed_section_titles":[],"added_section_titles":["Substitution"]},"disappear":{"revid":296571032,"parentid":296570251,"timestamp":"2009-06-15T16:41:19Z","removed_section_titles":["Substitution"],"added_section_titles":[]}} -->
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==History==
History: Skolem (1923) the first published version.