Are a and d your cup of tea

Are a and d your cup of tea
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a 和 d 你喜欢吗

DOI:
10.1007/bf02392740
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发表时间:
2000
期刊:
arXiv: Logic
影响因子:
--
通讯作者:
S. Shelah
S. Shelah
中科院分区:
--
文献类型:
--
作者:
S. Shelah

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我们证明了,一致地,每个MAD家庭都有严格大于控制数的基数,即a>d,从而解决了关于连续统的基数不变量的最古老的问题之一。该方法是对迭代强迫理论的一种贡献,使连续统变大。
We show that, consistently, every MAD family has cardinality strictly bigger than the dominating number, that is a > d, thus solving one of the oldest problems on cardinal invariants of the continuum. The method is a contribution to the theory of iterated forcing for making the continuum large.