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More accurate converses of the Jensen and the Lah-Ribarič operator inequality

In this paper we derive several converses of the Jensen and the Lah-Ribarič operator inequality regarding convexity in the classical real sense. In such a way, we obtain refinements of some recent results known from the literature.

Jensen operator inequality ; Lah-Ribari\v c operator inequality ; convexity ; operator convexity ; converse ; refinement

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