Abstract
In this paper, we give a new method to show a monotonicity result for a
function $f$ satisfying
$(_{a}\nabla_{h}^{\nu}f)(t)\leq0$
($(_{a}\nabla_{h,\ast}^{\nu}f)(t)\leq0$)
with $\nu\in(0,1]$, which has never
been solved in other papers. In addition, we give an example to
illustrate one of our main results.
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