May the successor of a singular cardinal be Jónsson?
Abstract
Abstract Whether the successor of a singular cardinal can be Jónsson is a very old and famous open problem in set theory. Here, we collect necessary conditions for an affirmative answer, and put forward a list of closely-related questions in singular cardinals combinatorics that could eventually lead to settling the main problem at hand.
Fields of Study & Subjects
Advanced Topology and Set Theory
Computability
Logic
AI Algorithms
Homotopy and Cohomology in Algebraic Topology
Publication details
- Journal / source
- Bollettino Della Unione Matematica Italiana
- Publication date
- 7 January 2026
- Language
- EN