The breadth of constructibility degrees and definable Sierpiński’s coverings

Fundamenta Mathematicae 2026 Open access

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Authors: Alessandro Andretta, Lorenzo Notaro
DOI: 10.4064/fm240819-27-11
Cited by: 0

Abstract

Generalizing a result of Törnquist and Weiss, we study the connection between the existence of Σ12 Sierpiński’s coverings of Rn, and a cardinal invariant of the upper semi-lattice of constructibility degrees known as breadth.

Fields of Study & Subjects

Advanced Topology and Set Theory Computability Logic AI Algorithms

Publication details

Journal / source
Fundamenta Mathematicae
Publisher
Institute of Mathematics, Polish Academy of Sciences
Publication date
20 May 2026
Language
EN