Universal forcing notions and ideals

by Roslanowski and Shelah. [RoSh:845]
Archive for Math Logic, 2007
The main result of this paper is a partial answer to [RoSh:672, Problem 5.5]: a finite iteration of Universal Meager forcing notions adds generic filters for many forcing notions determined by universality parameters. We also give some results concerning cardinal characteristics of the sigma --ideals determined by those universality parameters.


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