AN ALTERNATIVE NOTE ON THE SCHUR–CONVEXITY OF THE EXTENDED MEAN VALUES

摘要

The Schur-convex and Schur-concave properties with (x,y)in (0,∞)*(0,∞)for fixed (r,s)of the extended mean valuesE(r,s;x,y)are researched again, some errors in[F.Qi,J.Sandor,S.S.Dragomir,and A. Sofo, Notes on the Schur-convexity of the extended mean values,Taiwanese J. Math. 9,(3) (2005),411-420.RGMIA Res.Rep.Coll.5(2002),no.1,Art.3,19-27].