Article ID Journal Published Year Pages File Type
4662535 Annals of Pure and Applied Logic 2006 72 Pages PDF
Abstract

The results of this paper concern the effective cardinal structure of the subsets of [ω1]<ω1, the set of all countable subsets of ω1. The main results include dichotomy theorems and theorems which show that the effective cardinal structure is complicated.

Related Topics
Physical Sciences and Engineering Mathematics Logic