About this article
Published Online: Apr 09, 2020
Page range: 99 - 109
Received: Apr 02, 2019
Accepted: Jul 23, 2019
DOI: https://doi.org/10.2478/auom-2020-0007
Keywords
© 2020 F. Farshadifar et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Farshadifar, F.
Department of Mathematics, Farhangian UniversityTehran
Ansari-Toroghy, H.
Department of pure Mathematics, Faculty of Mathematical Sciences, University of GuilanRasht