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Some New Discrete Hermite-Hadamard Inequalities and Their Generalizations
  
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KeyWord:Discrete fractional calculus, $h$-convex functions, preinvex functions, Hermite-Hadamard inequalities, times scales
Author NameAffiliation
Xiaoyue Han School of Mathematical Sciences, Yangzhou University, 225002 Yangzhou, China 
Run Xu School of Mathematical Sciences, Qufu Normal University, 273165 Qufu, China 
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Abstract:
      This article mainly studies some new discrete Hermite-Hadamard inequalities for integer order and fractional order. For this purpose, the definitions of $h$-convexity and preinvexity for a real-valued function $f$ defined on a set of integers $\mathbb{Z}$ are introduced. Under these two new definitions, some new discrete Hermite-Hadamard inequalities for integer order related to the endpoints and the midpoint $\frac{a+b}{2}$ based on the substitution rules are proposed, and they are generalized to fractional order forms. In addition, for the $h$-convex function on the time scale $\mathbb{Z}$, two new discrete Hermite-Hadamard inequalities for integer order by dividing the time scale differently are obtained.