Annales Universitatis Paedagogicae Cracoviensis: Studia Mathematica (Sep 2015)
Further investigations on a question of Zhang and Lü
Abstract
In the paper taking the question of Zhang and Lü [15] into background, wepresent one theorem which will improve and extend results of Banerjee-Majumdar [2] and arecent result of Li-Huang [9].
Keywords