Vol. 62, No. 1, 1976

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Lumpy subsets in left-amenable locally compact semigroups

Mahlon M. Day

Vol. 62 (1976), No. 1, 87–92
Abstract

This note adapts to locally compact, topologically left-amenable semigroups S the characterization given by Mitchell in discrete semigroups of those subsets T of S substantial enough that at least one topologically left-invariant mean in S is concentrated in T.

Mathematical Subject Classification 2000
Primary: 43A07
Milestones
Received: 12 December 1975
Published: 1 January 1976
Authors
Mahlon M. Day