Title: The ideal of residually null sets - Chris Caruvana | Department of Mathematics

Title: The ideal of residually null sets - Chris Caruvana

Event Information
Event Location: 
GAB 461
Event Date: 
Friday, November 10, 2017 - 2:00pm

Abstract: We will define the notion of being residually null in a Polish space and show that it produces a sigma-ideal of sets in any Polish space. We will show that it contains the meager sets and universally null sets and, at least in models of ZFC+CH, that the containment is proper and, even more, that there exist residually null sets which cannot be written as the union of a meager set with a universally null set.

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