On possible restrictions of null and meager ideal

Thu, 04/05/2017 - 10:00
Speaker: 
Seminar: 
Place: 
Abstract: 
Fremlin asked if the null ideal restricted to a non null set of reals could be isomorphic to the non stationary ideal on omega_1. Eskew asked if the null and the meager ideal could both be somewhere countably saturated. We'll show that the answer to both questions is yes. Joint work with Shelah.