2 papers
math.LO2025
-Porosity of Certain Ideals
Paweł Klinga, Andrzej Nowik, Anna Wąsik
We investigate the -porosity of certain known ideals of subsets of natural numbers. Porosity is a notion of smallness in metric spaces that is stronger than nowhere density. Ana…
math.LO2001
Strongly meager sets can be quite big
Tomek Bartoszynski, Andrzej Nowik, Tomasz Weiss
The paper contains two results pointing to the lack of symmetry between measure and category. Assume CH. There exists a strongly meager subset of the Cantor set that can be mapped…