Two cardinal invariants of the continuum (${\mathfrak d}<{\mathfrak a}$) and FS linearly ordered iterated forcing

by Shelah. [Sh:700]
Acta Math, 2004
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.


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