Opial-Type Integral Inequalities Involving Several Arbitrary Increasing Convex Functions

Some new Opial-type integral inequalities involving several arbitrary increasing convex functions on both sides are proved. These results generalise and yield important complementary results of some known integral inequalities established by G. I. Rozanova, B. G. Pachpatte, E. K. Godunova and V. I. Levin, and T. S. Hwang and G. S. Yang.