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Some properties of a class of symmetric functions and its applications
Authors:Mingbao Sun  Nanbo Chen  Songhua Li
Affiliation:1. School of Mathematics, Hunan Institute of Science and Technology, , Yueyang 414006, Hunan, P. R. China;2. +86 3. 730 4. 8640 5. 488+86 6. 024;7. 8646 8. 390+86 
Abstract:For urn:x-wiley:dummy:mana201300073:equation:mana201300073-math-0001, the symmetric functions urn:x-wiley:dummy:mana201300073:equation:mana201300073-math-0002 are defined by urn:x-wiley:dummy:mana201300073:equation:mana201300073-math-0003 where urn:x-wiley:dummy:mana201300073:equation:mana201300073-math-0004, and urn:x-wiley:dummy:mana201300073:equation:mana201300073-math-0005 are non‐negative integers. In this paper, the Schur convexity, geometric Schur convexity and harmonic Schur convexity of urn:x-wiley:dummy:mana201300073:equation:mana201300073-math-0006 are investigated. As applications, Schur convexity for the other symmetric functions is obtained by a bijective transformation of independent variable for a Schur convex function, some analytic and geometric inequalities are established by using the theory of majorization, in particular, we derive from our results a generalization of Sharpiro's inequality, and give a new generalization of Safta's conjecture in the n‐dimensional space and others.
Keywords:Symmetric functions  Schur convex  geometric Schur convex  harmonic Schur convex  theory of majorization  05E05  26B25  52A40
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