A Selection Principle and Products in Topological Groups

Abstract

We consider the preservation under products, finite powers, and forcing, of a selection principle based covering property of $T_0$ topological groups. Though the paper is in part a survey, it contributes some new information, including: 1. The product of a strictly o-bounded group with an o-bounded group is an o-bounded group - Corollary 18 2. In the generic extension by a finite support iteration of ${\aleph }_1$ Hechler reals the product of any o-bounded group with a ground model ${\aleph }_0$ bounded group is an o-bounded group - Theorem 19 3. In the generic extension by a countable support iteration of length ${\aleph }_2$ Mathias reals the product of any o-bounded group with a ground model ${\aleph }_0$ bounded group is an o-bounded group - Theorem 20.

14 pages