Published Online: Jul 09, 2020
Page range: 45 - 50
Received: Nov 27, 2019
Accepted: Jun 03, 2020
DOI: https://doi.org/10.2478/amsil-2020-0014
Keywords
© 2020 Małgorzata Filipczak et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
We show that a large class of summable ideals can be defined using a certain kind of “sparseness” of subsets of the line near zero, but it is still an open question whether this gives a characterization of the whole class.