Maximal Chains in ωωand Ultrapowers of the Integers
Saharon Shelah, Juris Steprāns
Abstract
Various questions posed by P. Nyikos concerning ultrafilters on ω and chains in the partial order (ω,<*) are answered. The main tool is the oracle chain condition and variations of it.
Create a lesson
Related papers
Pseudofinite abelian groups and asymptotic classes of finite abelian groups
Carlos Cordoba-Caycedo, Dario Garcia
Spectral Theory and Descriptive Combinatorics for Non-Regular Borel pmp Graphs
Cecelia Higgins, Pieter Spaas, Sofia Torelli
The strength of the minimum principle in constructive reverse mathematics
Tatsuji Kawai
Independence of premise for intuitionistic Zermelo-Fraenkel set theory
Patrick Uftring
Condensed Whitehead Problem
Spencer Unger, Jerry Wei
Points and their multiples on curves in powers of simple abelian varieties
David J. Smith