Incompleteness for Higher-Order Arithmetic by Yong Cheng

Incompleteness for Higher-Order Arithmetic by Yong Cheng

Author:Yong Cheng
Language: eng
Format: epub
ISBN: 9789811399497
Publisher: Springer Singapore


Proposition 2.12

(1) implies that there exists a nontrivial elementary embedding and a club of regular L-cardinals.

(2) Suppose there exists a nontrivial elementary embedding and a club of regular L-cardinals. Then exists.

(3) Suppose there exists a nontrivial elementary embedding and a club of regular L-cardinals. Then exists.

Proof

Follows from the proof of Theorem 2.6 and Fact 2.5.

As a corollary of Theorem 5.​1, does not imply that exists, and hence does not imply that there exists a nontrivial elementary embedding and a club of regular L-cardinals.



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