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13 votes
1 answer
849 views

Mistake on article about Bohr compactification?

$\DeclareMathOperator\b{b}\newcommand\B{{\operatorname B}}$I wish to get help understanding the content of two theorems of [Iva] that seem mutually contradictory. First some context. Let $\b(\mathbb{R}...
6 votes
0 answers
76 views

About path-connected components of the Bohr compactification of $\mathbb{R}^d$

Let ${\rm b}(\mathbb{R}^d)$ denote the Bohr compactification of $\mathbb{R}^d$, with $d\in\mathbb{N}$. This is the Pontryagin dual of the group $\mathbb{R}^d_d$, corresponding to $\mathbb{R}^d$ with ...
-2 votes
1 answer
118 views

Mismatch between equivalent definitions of the Bohr compactification of the reals

I feel I'm overlooking something very silly. The Bohr compactification of $\mathbb R$ has two equivalent definitions. The set of (possibly discontinuous) homomorphisms $\mathbb R \to \mathbb T$ under ...
7 votes
2 answers
1k views

Bohr compactification as a topological compactification

Let $G$ be a locally compact Hausdorff group. Denote its Bohr compactification by $bG$. Despite group structure, $G$ has several (Hausdorff) compactifications that, in a sense, the smallest one is ...