[數撚圍爐區] 將一個波分成五份, 然後砌兩個同原本一樣的波的鬼故事 (108)

3日左右完cofinality嘅chapter，set theory就告一段落

但之後要做一大堆ordinal/cardinal arithmetic嘅exercise

By Konig(仲未prove，剩係Corollary), we could show 2^aleph_b > aleph_b for b is any ordinal, but not what exactly the size of 2^aleph_b, therefore is 2^aleph_0 = aleph_1?

差啲唔見左本數筆

AOC -> Konig
Regular, singular cardinal
Assume General Continuum Hypothesis + ZFC-> cardinal exponentiations變得容易解決
聽日應該完set theory，但係都只係basic set theory

手巴都諗緊好唔好放棄高薪厚職去追夢

完

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