Vol. 120, No. 1, 1985

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Free products of topological groups with amalgamation. II

Elyahu Katz and Sidney Allen Morris

Vol. 120 (1985), No. 1, 123–130
Abstract

The fundamental problem is to determine if the free product with amalgamation of Hausdorff topological groups exists and is Hausdorff. This is known to be true if the subgroup being amalgamated is central or if all groups concerned are kω and the amalgamation subgroup is compact. In this paper a general result is proved which allows one to move outside the class of compact or central amalgamations. Using this result it follows, for example, that the amalgamated free product F AG exists and is Hausdorff if F, G and A are kω-groups and A is the product of a central subgroup and a compact subgroup.

Mathematical Subject Classification 2000
Primary: 22A05
Milestones
Received: 9 July 1981
Revised: 4 July 1984
Published: 1 November 1985
Authors
Elyahu Katz
Sidney Allen Morris