Bourbaki

Remark

Tag 01R5, permanent. Cite it as [Bourbaki, Tag 01R5].

Topologie algébrique, chapter I, § 5. Revêtements principaux

If, in proposition 6, one does not suppose the space B locally connected, it may happen that the space E0E_0 is not a covering of B (I, p. 147, exerc. 1).

Bourbaki sets the proof directly after the statement, and the corpus does not separate them, so what is above is the statement and its proof together.

Cited by

Nothing.

Cites

Nothing.

Machine translation of the English, by gpt-5.4, against glossary version 34. Not checked by a person.