Sub-super-stabilizability of certain bivariate means via mean-convexity

Mustapha Raïssouli, József Sándor
2016 Journal of Inequalities and Applications  
In this paper, we first show that the first Seiffert mean P is concave whereas the second Seiffert mean T and the Neuman-Sándor mean NS are convex. As applications, we establish the sub-stabilizability/super-stabilizability of certain bivariate means. Open problems are derived as well. MSC: 26E60
doi:10.1186/s13660-016-1212-z fatcat:op7v3mu4xfbozn6xbh366cne64