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        第1類(lèi)反調(diào)和平均和對(duì)數(shù)平均的最優(yōu)凸組合界

        2013-03-01 04:36:18潘學(xué)功孟祥菊
        關(guān)鍵詞:學(xué)生處計(jì)算機(jī)系正數(shù)

        潘學(xué)功,孟祥菊

        (1.河北軟件職業(yè)技術(shù)學(xué)院 學(xué)生處,河北 保定 071000;2.保定學(xué)院 數(shù)學(xué)與計(jì)算機(jī)系,河北 保定 071000)

        設(shè)p∈R,2個(gè)正數(shù)a與b的p階冪平均定義為

        近年來(lái),冪平均及其不等式得到了廣泛的研究[1-11].眾所周知,對(duì)于固定的a,b>0且a≠b,Mp(a,b)于p∈R是連續(xù)和嚴(yán)格遞增的.

        如果定義

        [1]LONG Boyong,CHU Yuming.Optimal power mean bounds for the weighted geometric mean of classical means[J].Journal of Inequalities and Applications,2010,ID 905679:6.

        [2]XIA Weifeng,CHU Yuming,WANG Gendi.The optimal upper and lower power mean bounds for a convex combination of the arithmetic and logarithmic means[J].Abstract and Applied Analysis,2010,ID 604804:9.

        [3]CHU Yuming,XIA Weifeng.Two sharp inequalities for power mean,geometric mean and harmonic mean[J].Journal of Inequalities and Applications,2009,ID 741923:6.

        [4]WU Shanhe.Generalization and sharpness of the power means inequality and applications[J].Journal of Mathematical Analysis and Applications,2005,312(2):637-652.

        [5]RICHARDS K C.Sharp power mean bounds for the Gaussian hypergeometric function[J].Journal of Mathematical A-nalysis and Applications,2005,308(1):303-313.

        [6]WANG Wanlan,WEN Jiajin,SHI Huannan.Optimal inequalities involving power means[J].Acta Mathematica Sinica,2004,47 (6):1053-1062.

        [7]HAASTO P A.Optimal inequalities between Seiffert's mean and power mean[J].Mathematical Inequalities and Applications,2004,7(1):47-53.

        [8]TARNAVAS C D,TARNAVAS D D.An inequality for mixed power means[J].Mathematical Inequality and Applications,1999,2(2):175-181.

        [9]BUKOR J,TOTH J,ZSILINSZKY L.The logarithinic mean and the power mean of positive numbers[J].Octogon Mathematical Magazine,1994,2(1):19-24.

        [10]PECARIC J E.Generalization of the power means and their inequalities[J].Journal of Mathematical and Applications,1991,161(2):395-404.

        [11]CHEN Ji,HU Bo.The identric mean and the power mean inequalities of Ky Fan type[J].Facta Universitatis,1989,4:15-18.

        [12]ALZER H,JANOUS W.Solution of problem 8[J].Crux Mathematicorum,1987,13:173-178.

        [13]BULLEN P S,MRITRINOVIC D S,VASIC P M.Means and their inequalities[J].Mathematics and Its Applications:East European eries,1998,31:459.

        [14]MAO Qiji.Power mean,logarithmic mean and Heronian dual mean of two positive numbers[J].Journalof Suzhou College of Education,1999,16(1-2):82-85.

        [15]CARLSON B C.The logarithmic mean[J].The American Mathematical Monthly,1972,79:615-618.

        [16]LEACH E B,SHOLANDER M C.Extended mean valuesⅡ[J].Journal of Mathematical Analysis and Applications,1983,92(1):207-223.

        [17]SANDOR J.A note on some inequalities for means[J].Archivder Mathematik,1991,56(5):471-473.

        [18]SHI Mingyu,CHU Yuming,JIANG Yueping.Optimal Inequalities among various means of two arguments[J].Abstract and Applied Analysis,2009,ID 694394:10.

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