Difference between revisions of "Middle attic"

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(reflecting cardinals)
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* [[cardinal | cardinals]], [[infinite]] cardinals
 
* [[cardinal | cardinals]], [[infinite]] cardinals
 
* [[Aleph zero | $\aleph_0$]] and the rest of the [[lower attic]]
 
* [[Aleph zero | $\aleph_0$]] and the rest of the [[lower attic]]
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[[Category:Middle attic| ]]

Latest revision as of 22:26, 21 August 2021

St. Augustine Lighthouse photo by Madrigar

Welcome to the middle attic, where the uncountable cardinals, that solid stock of mathematics, begin their endless upward structural progession. Here, we survey the infinite cardinals whose existence can be proved in, or is at least equiconsistent with, the ZFC axioms of set theory.