Corollary
Tag 0BYN, permanent. Cite it as [Bourbaki, Tag 0BYN].
General Topology, chapter VII, § 1. Subgroups and quotient groups of $\mathbf{R}^n$
Every closed subgroup of , other than itself, is a finite cyclic group. Every Hausdorff quotient group of , other than , is isomorphic to .
Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.
Cited by
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Cites
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