[HTML][HTML] Ideals on countable sets: a survey with questions
C Uzcátegui Aylwin - Revista Integración, 2019 - scielo.org.co
An ideal on a set X is a collection of subsets of X closed under the operations of taking finite
unions and subsets of its elements. Ideals are a very useful notion in topology and set theory …
unions and subsets of its elements. Ideals are a very useful notion in topology and set theory …
On Katětov and Katětov–Blass orders on analytic P-ideals and Borel ideals
H Sakai - Archive for Mathematical Logic, 2018 - Springer
Abstract Minami–Sakai (Arch Math Logic 55 (7–8): 883–898, 2016) investigated the cofinal
types of the Katětov and the Katětov–Blass orders on the family of all F_ σ F σ ideals. In this …
types of the Katětov and the Katětov–Blass orders on the family of all F_ σ F σ ideals. In this …
On the automorphism groups of universal submeasures
D Meza-Alcántara, F Nunez-Rosales - Topology and its Applications, 2022 - Elsevier
We investigate dynamical properties of the automorphism groups of general versions of the
universal submeasures defined in [3]. First, we show that, a universal submeasure D-valued …
universal submeasures defined in [3]. First, we show that, a universal submeasure D-valued …