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A multiple Opial type inequality for the Riemann-Liouville fractional derivatives

The aim of this paper is to prove a multiple Opial type inequality for Riemann-Liouville fractional derivatives which is proved for two factors and ordinary derivatives by Fink. Two methods are applied and a comparison of the obtained estimations is also given.

Riemann-Liouville fractional derivative; composition identity; Opial type inequality; Laplace transform

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