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Abstract: |
In the article, a functional inequality in abstract spaces is
established, which gives a new affirmative answer to an open problem
posed by Feng Qi in [9]. Moreover, some integral inequalities and a discrete inequality involving sums are deduced. [9] FENG QI, Several integral inequalities, J. Inequal. Pure Appl. Math., 1(2) (2000), Art.19.;
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