Bourbaki

Corollary 2

Tag 047Z, permanent. Cite it as [Bourbaki, Tag 047Z].

Commutative Algebra, chapter II, § 3. Local rings. Passage from the local to the global

Let AA be a ring which is not necessarily commutative, mm a two-sided ideal of AA contained in the Jacobson radical of AA, MM a left AA-module and (xi)i∈I(x_i)_{i \in I} a family of elements of MM. If MM is finitely generated or mm is nilpotent and the elements 1⊗xi1 \otimes x_i (i∈Ii \in I) generate the left (A/m)(A/m)-module (A/m)⊗AM(A/m) \otimes_A M, the xix_i generate MM.

Let (ei)i∈I(e_i)_{i \in I} be the canonical basis of the left AA-module As(I)A_s^{(I)}: it is sufficient to apply Corollary 1 to the AA-linear mapping u:As(I)→Mu : A_s^{(I)} \to M such that u(ei)=xiu(e_i) = x_i for all i∈Ii \in I.

Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.

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Transcribed from the printed volume. Not translated.