most citedComparison of the sets of attractors for systems of contractions and weak contractions

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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…