O artykule
Data publikacji: 31 gru 2020
Zakres stron: 35 - 38
Otrzymano: 17 lip 2019
Przyjęty: 23 wrz 2019
DOI: https://doi.org/10.2478/aupcsm-2020-0003
Słowa kluczowe
© 2020 Amir Sahami, published by Sciendo
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.
In this short note, we give some counter examples which show that [11, Proposition 3.5] is not true. As a consequence, the arguments in [11, Proposition 4.10] are not valid.