À propos de cet article
Publié en ligne: 11 oct. 2021
Pages: 26 - 29
Reçu: 08 juil. 2021
Accepté: 26 sept. 2021
DOI: https://doi.org/10.2478/amsil-2021-0013
Mots clés
© 2021 Wojciech Bielas, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Bielas, Wojciech
Institute of Mathematics, University of Silesia in KatowiceKatowice, Poland