Journal of Computational and Applied Mathematics, cilt.485, 2026 (SCI-Expanded, Scopus)
This research utilizes the (k, s)-Riemann-Liouville fractional integral operator (RLFIO) to investigate reverse forms of Hermite-Hadamard-Fejér (HHF), Minkowski's and Hölder type inequalities within an interval-valued (I.V) (ℵs+1,℧) class of convex functions. The concept of I.V (ℵs+1,℧)-convexity associated with the (k, s)-RLFIO is introduced, which generalizes several existing convexity definitions. By assigning specific values to the parameters, bounds for the (k, s)-RLFIO within the I.V (ℵs+1,℧) framework are established, leading to new refinements of HHF and Pachpatte-type inequalities. Finally, the implications of these results are explored and validated through simulations and graphical visualizations.