The breadth of constructibility degrees and definable Sierpiński's coverings
arXiv:2408.10182 · doi:10.4064/fm240819-27-11
Abstract
Generalizing a result of Törnquist and Weiss, we study the connection between the existence of Sierpiński's coverings of , and a cardinal invariant of the upper semi-lattice of constructibility degrees known as breadth.
14 pages