On regular ultrafilters, Boolean ultrapowers, and Keisler's order (Iterated Forcing Theory and Cardinal Invariants)
Francesco Parente · Institutional Repositories DataBase (IRDB) · 2018
In this paper we analyse and compare two different notions of regularity for filters on complete Boolean algebras. We also announce two results from a forthcoming paper in preparation, which provide a characterization of Keisler's order in terms of Boolean ultrapowers.