On Hermite–Hadamard–Fejér-type inequalities for co-ordinated trigonometrically ρ-convex functions

Abstract

In this paper, we first obtain Hermite–Hadamard–Fejér inequalities for co-ordinated trigonometrically [Formula: see text]-convex functions. By using these obtained inequalities, we give some inequalities involving Riemann–Liouville fractional integrals. The inequalities presented in this study provide generalizations of some results given in earlier works.