We prove that for a metrizable space X the following are equivalent: (i) the free Abelian topological group A(X) is the inductive limit of the sequence {A n (X): n ∈ N}, where A n (X) is formed by all words of reduced length n; (ii) X is locally compact and the set of all non-isolated points of X is
On biradial topological spaces and groups
✍ Scribed by A.V. Arhangel'skiǐ
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 491 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0166-8641
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
We investigate C-compact and relatively pseudocompact subsets of Tychonoff spaces with a special emphasis given to subsets of topological groups. It is shown that a relatively pseudocompact subset of a space X is C-compact in X, but not vice versa. If, however, X is a topological group, then these p
We prove that if X is a Tychonoff topological space, Y a subspace of X, and every bounded continuous pseudometric on Y can be extended to a continuous pseudometric on X, then the free topological group F M (Y ) coincides with the topological subgroup of F M (X) generated by Y . For this purpose, a n
Given a completely regular space X with two uniformities b/I and/-/r both generating the original topology of X, we consider the question wbeth~ there exists a Hausdofff topological group G comaining X as a subspace such that \*Vlx = b/~ and V\* Ix = b/r, where \*~ and ~;\* are respectively the left