Remark
Tag 05NG, permanent. Cite it as [Bourbaki, Tag 05NG].
Algebra, chapter II, § 2. Modules of linear mappings. Duality
From (17) and (18) it follows that if is left (resp. right) invertible, is right (resp. left) invertible.
Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.
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