Levinson's limit-point criterion and powers
نویسندگان
چکیده
منابع مشابه
A Note on Powers of Singular Strong Limit Cardinals
We show via a simple forcing argument that if κ ≥ א0 is any cardinal such that κ+ω is a strong limit cardinal, then 2κ +ω < κ+ω4 . Our proof makes use of pcf theory applied only at אω and is generalizable to other contexts. One of the most important results in all of set theory is Shelah’s celebrated theorem [2] that if אω is a strong limit cardinal, then 2אω < אω4 . This theorem is proven via ...
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ژورنال
عنوان ژورنال: Journal of Mathematical Analysis and Applications
سال: 1978
ISSN: 0022-247X
DOI: 10.1016/0022-247x(78)90155-5