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Publicado en línea: 09 jul 2020
Páginas: 45 - 50
Recibido: 27 nov 2019
Aceptado: 03 jun 2020
DOI: https://doi.org/10.2478/amsil-2020-0014
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© 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.