À propos de cet article
Publié en ligne: 30 déc. 2015
Pages: 105 - 119
Reçu: 04 avr. 2015
DOI: https://doi.org/10.1515/aupcsm-2015-0008
© by Abhijit Banerjee
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.
In the paper based on the question of Zhang and Lü [15], we present one theorem which will improve and extend results of Banerjee-Majumder [2] and a recent result of Li-Huang [9].