Abstract. In this paper, firstly we prove an integral identity that one can derive several new equalities for special selections of 𝑛 from this identity. Secondly, we established more general ...

Abstract. As one of the main results we prove that if 𝑓 has Lagrange unique property then 𝑓 is strictly convex or concave (we do not assume continuity of the derivative), Theorem 2.1. We give two ...