On topological analogues of left thick subsets in semigroups

James Chin-Sze Wong

Vol. 83 (1979), No. 2, 571–585

DOI: 10.2140/pjm.1979.83.571

Abstract

We discuss the relation among various topological analogues of left thickness in semigroups and their connection with left invariant means for locally compact separately continuous semigroups. Until now, most results in this direction have been obtained for only jointly continuous semigroups. However, an important convolution formula found recently by this author made the transition to separately continuous cases possible.

Mathematical Subject Classification 2000

Primary: 43A07

Secondary: 43A05

Milestones

Received: 3 May 1978

Revised: 8 March 1979

Published: 1 August 1979