On Second Riesz Φ-Variation of Normed Space Valued Maps
On Second Riesz Φ-Variation of Normed Space Valued Maps
In this article we present a Riesz-type generalization of the concept of second variation of normed space valued functions defined on an interval [a,b]R. We show that a function f [a,b], where X is a reflexive Banach space, is of bounded second Φ-variation, in the sense of Riesz, if and …