Why do we have negative sign alternatively in right-sided Riemann-Liouville fractional derivative?

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Vikash Pandey

Your question is not clear. Can you please share the equation through a pdf file or screenshot?

Mohammed S. Abdo

Thanks, plz see attached file Vikash Pandey

Thanks for sharing the picture. That clears the situation. That particular definition is called Backward derivative. x is replaced by -x. See the kernels carefully and the limits of integration in those two definitions. It will become clear on its own.

Thanks Vikash Pandey