About this article
Published Online: Dec 25, 2020
Page range: 23 - 38
Received: Jun 20, 2020
Accepted: Jul 14, 2020
DOI: https://doi.org/10.2478/udt-2020-0009
Keywords
© 2020 Uriya Pumerantz, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Pumerantz, Uriya
Department of Mathematics, Tel Aviv UniversityTel-Aviv, Israel