2012/01/10 by Andrzej Starosolski, Starosolski, Andrzej
Computer Science · Mathematics · #03E05 #03E10 #Advanced Algebra and Logic #Approximation Theory and Sequence Spaces #FOS: Mathematics #Logic (math.LO) #Rough Sets and Fuzzy Logic #math.LO #msc:03E05 #msc:03E10
paper · pdf · doi:10.48550/arxiv.1201.2148
19 pages
openalex publication_date 2012/01/10 · arxiv created 2012/11/14 · arxiv updated 2012/11/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
An earlier paper, entitled "P-hierarchy on βω", investigated the relations between ordinal ultrafilters and the so-called P-hierarchy. This study is continued in the present paper and focuses on the aspects of characterization of classes of finite index, existence, generic existence and the Rudin-Keisler-order.