A note on multivariate Ostrowski type inequalities *

In this note, we establish some multivariate Ostrowski type inequalities involving several functions. Keywords and Phrases: Multivariate, Ostrowski type inequalities, n-fold integral.
1. Introduction Throughout, R and [R.sup.n] denote the set of real numbers and the n--dimensional Euclidean space, respectively. Let D = {([x.sub.1], ..., [x.sub.n])∈ [R.sup.n]: [a.sub.i] < [x.sub.i] < [b.sub.i] [...]