The Range of Invariant Means on Locally Compact Abelian Groups

Abstract

Abstract It has been shown by E. Granirer that for certain infinite amenable discrete groups G there exists a nested family of left almost convergent subsets of G on which every left invariant mean on m(G) attains as its range the entire [0,1] interval. This paper examines the range of left invariant means on L ∞ ( G ) for infinite locally compact abelian groups G and demonstrates the existence in every such group of a nested family of left almost convergent Borel subsets on which every left invariant mean on L ∞ ( G ) attains as its range the interval [0,1],