Title

Determination of Means by Invariance

Department

Mathematics

Document Type

Article

Publication Date

10-1-2006

Abstract

If M is a mean on and M(f(x1),f(x2),…,f(xn))=f(M(x1,x2,…,xn)) then we say that M is invariant under f. The problem is to find a class of functions that by invariance determines a mean uniquely. We focus on the geometric mean, which can be transformed to obtain results for other means.