Riemann-Liouville fractional Hermite-Hadamard inequalities for h-preinvex functions.

In this paper, we first prove two Hermite-Hadamard type inequalities for h-preinvex functions via Riemann-Liouville fractional integrals, and then, by introducing an integral identity including the second order derivatives of a given function, we establish some Hermite-Hadamard type inequalities for functions whose second order derivatives are h-preinvex via Riemann-Liouville fractional integrals. [ABSTRACT FROM AUTHOR]