Measurable cardinal: Difference between revisions
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In [[mathematics]], a [[cardinal number]] κ is called '''superstrong''' [[if and only if]] there exists an [[elementary embedding]] ''j'' : ''V'' → ''M'' from ''V'' into a transitive inner model ''M'' with [[critical point (set theory)|critical point]] κ and <math>V_{j(\kappa)}</math> ⊆ ''M''. | |||
Similarly, a cardinal κ is '''n-superstrong''' if and only if there exists an [[elementary embedding]] ''j'' : ''V'' → ''M'' from ''V'' into a transitive inner model ''M'' with [[critical point (set theory)|critical point]] κ and <math>V_{j^n(\kappa)}</math> ⊆ ''M''. [[Akihiro Kanamori]] has shown that the consistency strength of an n+1-superstrong cardinal exceeds that of an [[n-huge cardinal]] for each n > 0. | |||
== References == | |||
* {{cite book|last=Kanamori|first=Akihiro|authorlink=Akihiro Kanamori|year=2003|publisher=Springer|title=The Higher Infinite : Large Cardinals in Set Theory from Their Beginnings|edition=2nd ed|isbn=3-540-00384-3}} | |||
[[Category:Set theory]] | |||
[[Category:Large cardinals]] | |||
{{settheory-stub}} |
Revision as of 16:43, 2 December 2013
In mathematics, a cardinal number κ is called superstrong if and only if there exists an elementary embedding j : V → M from V into a transitive inner model M with critical point κ and ⊆ M.
Similarly, a cardinal κ is n-superstrong if and only if there exists an elementary embedding j : V → M from V into a transitive inner model M with critical point κ and ⊆ M. Akihiro Kanamori has shown that the consistency strength of an n+1-superstrong cardinal exceeds that of an n-huge cardinal for each n > 0.
References
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